African Explorations.--Barth, Richardson, Overweg, Werne, Brun-Rollet, Penney, Andrea, Debono, Miani, Guillaume Lejean, Bruce, Krapf and Rebmann, Maizan, Roscher, Burton and Speke.

The aerial line which Dr. Ferguson counted upon following had not been chosen at random¹; his point of departure had been carefully studied, and it was not without good cause that he had resolved to ascend² at the island of Zanzibar. This island, lying near to the eastern coast of Africa, is in the sixth degree of south latitude³, that is to say, four hundred and thirty geographical⁴ miles below the equator.

From this island the latest expedition, sent by way of the great lakes to explore the sources of the Nile, had just set out.

But it would be well to indicate what explorations Dr. Ferguson hoped to link together. The two principal ones were those of Dr. Barth in 1849, and of Lieutenants⁵ Burton and Speke in 1858.

Dr. Barth is a Hamburger, who obtained permission for himself and for his countryman Overweg to join the expedition of the Englishman Richardson. The latter was charged with a mission in the Soudan.

This vast region is situated⁶ between the fifteenth and tenth degrees of north latitude; that is to say, that, in order to approach it, the explorer must penetrate⁷ fifteen hundred miles into the interior of Africa.

Until then, the country in question had been known only through the journeys of Denham, of Clapperton, and of Oudney, made from 1822 to 1824. Richardson, Barth, and Overweg, jealously anxious to push their investigations⁸ farther, arrived at Tunis and Tripoli, like their predecessors⁹, and got as far as Mourzouk, the capital of Fezzan.

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1 random
adj.随机的；任意的；n.偶然的(或随便的)行动
参考例句：
The list is arranged in a random order.名单排列不分先后。 On random inspection the meat was found to be bad.经抽查，发现肉变质了。

2 ascend
vi.渐渐上升，升高；vt.攀登，登上
参考例句：
We watched the airplane ascend higher and higher.我们看着飞机逐渐升高。 We ascend in the order of time and of development.我们按时间和发展顺序向上溯。

3 latitude
n.纬度，行动或言论的自由(范围)，(pl.)地区
参考例句：
The latitude of the island is 20 degrees south.该岛的纬度是南纬20度。 The two cities are at approximately the same latitude.这两个城市差不多位于同一纬度上。

4 geographical
adj.地理的；地区(性)的
参考例句：
The current survey will have a wider geographical spread.当前的调查将在更广泛的地域范围內进行。 These birds have a wide geographical distribution.这些鸟的地理分布很广。

5 lieutenants
n.陆军中尉( lieutenant的名词复数 )；副职官员；空军；仅低于…官阶的官员
参考例句：
In the army, lieutenants are subordinate to captains. 在陆军中，中尉是上尉的下级。 来自《现代汉英综合大词典》 Lieutenants now cap at 1.5 from 1. Recon at 1. 中尉现在由1人口增加的1.5人口。侦查小组成员为1人口。 来自互联网

6 situated
adj.坐落在...的，处于某种境地的
参考例句：
The village is situated at the margin of a forest.村子位于森林的边缘。 She is awkwardly situated.她的处境困难。

7 penetrate
v.透(渗)入；刺入，刺穿；洞察，了解
参考例句：
Western ideas penetrate slowly through the East.西方观念逐渐传入东方。 The sunshine could not penetrate where the trees were thickest.阳光不能透入树木最浓密的地方。

8 investigations
（正式的）调查( investigation的名词复数 )； 侦查； 科学研究； 学术研究
参考例句：
His investigations were intensive and thorough but revealed nothing. 他进行了深入彻底的调查，但没有发现什么。 He often sent them out to make investigations. 他常常派他们出去作调查。

9 predecessors
n.前任( predecessor的名词复数 )；前辈；（被取代的）原有事物；前身
参考例句：
The new government set about dismantling their predecessors' legislation. 新政府正着手废除其前任所制定的法律。 来自《简明英汉词典》 Will new plan be any more acceptable than its predecessors? 新计划比原先的计划更能令人满意吗？ 来自《简明英汉词典》

10 perpendicular
adj.垂直的，直立的；n.垂直线，垂直的位置
参考例句：
The two lines of bones are set perpendicular to one another.这两排骨头相互垂直。 The wall is out of the perpendicular.这墙有些倾斜。

11 westward
n.西方，西部；adj.西方的，向西的；adv.向西
参考例句：
We live on the westward slope of the hill.我们住在这座山的西山坡。 Explore westward or wherever.向西或到什么别的地方去勘探。

12 pillage
v.抢劫；掠夺；n.抢劫，掠夺；掠夺物
参考例句：
The invading troops were guilty of rape and pillage.侵略军犯了抢劫和强奸的罪。 It was almost pillage.这简直是一场洗劫。

13 caravan
n.大蓬车；活动房屋
参考例句：
The community adviser gave us a caravan to live in.社区顾问给了我们一间活动住房栖身。 Geoff connected the caravan to the car.杰弗把旅行用的住屋拖车挂在汽车上。

14 oasis
n.（沙漠中的）绿洲，宜人的地方
参考例句：
They stopped for the night at an oasis.他们在沙漠中的绿洲停下来过夜。 The town was an oasis of prosperity in a desert of poverty.该镇是贫穷荒漠中的一块繁荣的“绿洲”。

15 dint
n.由于，靠；凹坑
参考例句：
He succeeded by dint of hard work.他靠苦干获得成功。 He reached the top by dint of great effort.他费了很大的劲终于爬到了顶。

16 perseverance
n.坚持不懈，不屈不挠
参考例句：
It may take some perseverance to find the right people.要找到合适的人也许需要有点锲而不舍的精神。 Perseverance leads to success.有恒心就能胜利。

17 succumbed
不再抵抗（诱惑、疾病、攻击等）( succumb的过去式和过去分词 )； 屈从； 被压垮； 死
参考例句：
The town succumbed after a short siege. 该城被围困不久即告失守。 After an artillery bombardment lasting several days the town finally succumbed. 在持续炮轰数日后，该城终于屈服了。

18 fatigue
n.疲劳，劳累
参考例句：
The old lady can't bear the fatigue of a long journey.这位老妇人不能忍受长途旅行的疲劳。 I have got over my weakness and fatigue.我已从虚弱和疲劳中恢复过来了。

19 forth
adv.向前；向外，往外
参考例句：
The wind moved the trees gently back and forth.风吹得树轻轻地来回摇晃。 He gave forth a series of works in rapid succession.他很快连续发表了一系列的作品。

20 longitude
n.经线，经度
参考例句：
The city is at longitude 21°east.这个城市位于东经21度。 He noted the latitude and longitude,then made a mark on the admiralty chart.他记下纬度和经度，然后在航海图上做了个标记。

21 plunged
v.颠簸( plunge的过去式和过去分词 )；暴跌；骤降；突降
参考例句：
The train derailed and plunged into the river. 火车脱轨栽进了河里。 She lost her balance and plunged 100 feet to her death. 她没有站稳，从100英尺的高处跌下摔死了。

22 languish
vi.变得衰弱无力，失去活力，（植物等）凋萎
参考例句：
Without the founder's drive and direction,the company gradually languished.没有了创始人的斗志与指引，公司逐渐走向没落。 New products languish on the drawing board.新产品在计划阶段即告失败。

23 inflicted
把…强加给，使承受，遭受( inflict的过去式和过去分词 )
参考例句：
They inflicted a humiliating defeat on the home team. 他们使主队吃了一场很没面子的败仗。 Zoya heroically bore the torture that the Fascists inflicted upon her. 卓娅英勇地承受法西斯匪徒加在她身上的酷刑。

24 Christian
adj.基督教徒的；n.基督教徒
参考例句：
They always addressed each other by their Christian name.他们总是以教名互相称呼。 His mother is a sincere Christian.他母亲是个虔诚的基督教徒。

25 besiege
vt.包围，围攻，拥在...周围
参考例句：
The Afghan air force was using helicopters to supply the besieged town.阿富汗空军正用直升机向被围城镇提供补给。 She was besieged by the press and the public.她被媒体和公众纠缠不休。

26 abject
adj.极可怜的，卑屈的
参考例句：
This policy has turned out to be an abject failure.这一政策最后以惨败而告终。 He had been obliged to offer an abject apology to Mr.Alleyne for his impertinence.他不得不低声下气，为他的无礼举动向艾莱恩先生请罪。

27 destitution
n.穷困，缺乏，贫穷
参考例句：
The people lived in destitution. 民生凋敝。 来自《现代汉英综合大词典》 His drinking led him to a life of destitution. 酗酒导致他生活贫穷。 来自辞典例句

28 regained
复得( regain的过去式和过去分词 )； 赢回； 重回； 复至某地
参考例句：
The majority of the people in the world have regained their liberty. 世界上大多数人已重获自由。 She hesitated briefly but quickly regained her poise. 她犹豫片刻，但很快恢复了镇静。

29 survivor
n.生存者，残存者，幸存者
参考例句：
The sole survivor of the crash was an infant.这次撞车的惟一幸存者是一个婴儿。 There was only one survivor of the plane crash.这次飞机失事中只有一名幸存者。

30 noted
adj.著名的，知名的
参考例句：
The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。 Jim is noted for arriving late for work.吉姆上班迟到出了名。

31 accomplished
adj.有才艺的；有造诣的；达到了的
参考例句：
Thanks to your help,we accomplished the task ahead of schedule.亏得你们帮忙,我们才提前完成了任务。 Removal of excess heat is accomplished by means of a radiator.通过散热器完成多余热量的排出。

32 ascended
v.上升，攀登( ascend的过去式和过去分词 )
参考例句：
He has ascended into heaven. 他已经升入了天堂。 来自《简明英汉词典》 The climbers slowly ascended the mountain. 爬山运动员慢慢地登上了这座山。 来自《简明英汉词典》

33 narrative
n.叙述，故事；adj.叙事的，故事体的
参考例句：
He was a writer of great narrative power.他是一位颇有记述能力的作家。 Neither author was very strong on narrative.两个作者都不是很善于讲故事。

34 auspices
n.资助，赞助
参考例句：
The association is under the auspices of Word Bank.这个组织是在世界银行的赞助下办的。 The examination was held under the auspices of the government.这次考试是由政府主办的。

35 consul
n.领事；执政官
参考例句：
A consul's duty is to help his own nationals.领事的职责是帮助自己的同胞。 He'll hold the post of consul general for the United States at Shanghai.他将就任美国驻上海总领事(的职务)。

36 penetrated
adj. 击穿的，鞭辟入里的 动词penetrate的过去式和过去分词形式
参考例句：
The knife had penetrated his chest. 刀子刺入了他的胸膛。 They penetrated into territory where no man had ever gone before. 他们已进入先前没人去过的地区。

37 exhaustion
n.耗尽枯竭，疲惫，筋疲力尽，竭尽，详尽无遗的论述
参考例句：
She slept the sleep of exhaustion.她因疲劳而酣睡。 His exhaustion was obvious when he fell asleep standing.他站着睡着了，显然是太累了。

38 cataracts
n.大瀑布( cataract的名词复数 )；白内障
参考例句：
The rotor cataracts water over the top of the machines. 回转轮将水从机器顶上注入。 来自《现代英汉综合大词典》 Cataracts of rain flooded the streets. 倾盆大雨弄得街道淹水。 来自辞典例句

39 apparently
adv.显然地；表面上，似乎
参考例句：
An apparently blind alley leads suddenly into an open space.山穷水尽，豁然开朗。 He was apparently much surprised at the news.他对那个消息显然感到十分惊异。

40 embarked
乘船( embark的过去式和过去分词 )； 装载； 从事
参考例句：
We stood on the pier and watched as they embarked. 我们站在突码头上目送他们登船。 She embarked on a discourse about the town's origins. 她开始讲本市的起源。

41 retinue
n.侍从；随员
参考例句：
The duchess arrived,surrounded by her retinue of servants.公爵夫人在大批随从人马的簇拥下到达了。 The king's retinue accompanied him on the journey.国王的侍从在旅途上陪伴着他。

42 rev
v.发动机旋转，加快速度
参考例句：
It's his job to rev up the audience before the show starts.他要负责在表演开始前鼓动观众的热情。 Don't rev the engine so hard.别让发动机转得太快。

43 scotch
n.伤口，刻痕；苏格兰威士忌酒；v.粉碎，消灭，阻止；adj.苏格兰(人)的
参考例句：
Facts will eventually scotch these rumours.这种谣言在事实面前将不攻自破。 Italy was full of fine views and virtually empty of Scotch whiskey.意大利多的是美景，真正缺的是苏格兰威士忌。

44 missionary
adj.教会的，传教(士)的；n.传教士
参考例句：
She taught in a missionary school for a couple of years.她在一所教会学校教了两年书。 I hope every member understands the value of missionary work. 我希望教友都了解传教工作的价值。

45 torment
n.折磨；令人痛苦的东西(人)；vt.折磨；纠缠
参考例句：
He has never suffered the torment of rejection.他从未经受过遭人拒绝的痛苦。 Now nothing aggravates me more than when people torment each other.没有什么东西比人们的互相折磨更使我愤怒。

46 assassinated
v.暗杀( assassinate的过去式和过去分词 )；中伤；诋毁；破坏
参考例句：
The prime minister was assassinated by extremists. 首相遭极端分子暗杀。 Then, just two days later, President Kennedy was assassinated in Dallas. 跟着在两天以后，肯尼迪总统在达拉斯被人暗杀。 来自辞典例句

47 pillaged
v.抢劫，掠夺( pillage的过去式和过去分词 )
参考例句：
They are to be pillaged and terrorised in Hitler's fury and revenge. 在希特勒的狂怒和报复下，他们还遭到掠夺和恐怖统治。 来自辞典例句 They villages were pillaged and their crops destroyed. 他们的村子被抢，他们的庄稼被毁。 来自辞典例句

48 slain
杀死，宰杀，杀戮( slay的过去分词 )； (slay的过去分词)
参考例句：
The soldiers slain in the battle were burried that night. 在那天夜晚埋葬了在战斗中牺牲了的战士。 His boy was dead, slain by the hand of the false Amulius. 他的儿子被奸诈的阿缪利乌斯杀死了。

49 rendezvous
n.约会，约会地点，汇合点；vi.汇合，集合；vt.使汇合，使在汇合地点相遇
参考例句：
She made the rendezvous with only minutes to spare.她还差几分钟时才来赴约。 I have a rendezvous with Peter at a restaurant on the harbour.我和彼得在海港的一个餐馆有个约会。

50 caravans
（可供居住的）拖车（通常由机动车拖行）( caravan的名词复数 )； 篷车； （穿过沙漠地带的）旅行队（如商队）
参考例句：
Old-fashioned gypsy caravans are painted wooden vehicles that are pulled by horses. 旧式的吉卜赛大篷车是由马拉的涂了颜色的木质车辆。 Old-fashioned gypsy caravans are painted wooden vehicles. 旧时的吉普赛大篷车是涂了颜色的木质车辆。

51 fauna
n.(一个地区或时代的)所有动物，动物区系
参考例句：
This National Park is an area with unique fauna and flora.该国家公园区域内具有独特的动物种群和植物种群。 Fauna is a biological notion means all the animal life in a particular region or period. 动物群是一个生物学的概念，指的是一个特定时期或者地区的所有动物。

52 flora
n.(某一地区的)植物群
参考例句：
The subtropical island has a remarkably rich native flora.这个亚热带岛屿有相当丰富的乡土植物种类。 All flora need water and light.一切草木都需要水和阳光。

53 northward
adv.向北；n.北方的地区
参考例句：
He pointed his boat northward.他将船驶向北方。 I would have a chance to head northward quickly.我就很快有机会去北方了。

54 descry
v.远远看到；发现；责备
参考例句：
I descry a sail on the horizon.我看见在天水交接处的轮船。 In this beautiful sunset photo,I seem to descry the wings of the angel.在美丽日落照片中，我好像看到天使的翅膀。