Book III chapter 6

A similar story is told also of the generation of birds. For there are some who say that the raven¹ and the ibis unite at the mouth, and among quadrupeds that the weasel brings forth² its young by the mouth; so say Anaxagoras and some of the other physicists³, speaking too superficially and without consideration. Concerning the birds, they are deceived by a false reasoning, because the copulation of ravens⁴ is seldom seen, but they are often seen uniting with one another with their beaks⁵, as do all the birds of the raven family; this is plain with domesticated⁶ jackdaws. Birds of the pigeon kind do the same, but, because they also plainly copulate, therefore they have not had the same legend told of them. But the raven family is not amorous⁷, for they are birds that produce few young, though this bird also has been seen copulating before now. It is a strange thing, however, that these theorists do not ask themselves how the semen enters the uterus through the intestine⁸, which always concocts⁹ whatever comes into it, as the nutriment; and these birds have a uterus like others, and eggs are found them near the hypozoma. And the weasel has a uterus in like manner to the other quadrupeds; by what passage is the embryo¹⁰ to get from it to the mouth? But this opinion has arisen because the young of the weasel are very small like those of the other fissipeds, of which we shall speak later, and because they often carry the young about in their mouths.

Much deceived also are those who make a foolish statement about the trochus and the hyena¹¹. Many say that the hyena, and Herodorus the Heracleot says that the trochus, has two pudenda, those of the male and of the female, and that the trochus impregnates itself but the hyena mounts and is mounted in alternate years. This is untrue, for the hyena has been seen to have only one pudendum, there being no lack of opportunity for observation in some districts, but hyenas¹² have under the tail a line like the pudendum of the female. Both male and female have such a mark, but the males are taken more frequently; this casual observation has given rise to this opinion. But enough has been said of this.

1 raven   

n.渡鸟，乌鸦；adj.乌亮的

参考例句：

• We know the raven will never leave the man's room.我们知道了乌鸦再也不会离开那个男人的房间。
• Her charming face was framed with raven hair.她迷人的脸上垂落着乌亮的黑发。

2 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。

3 physicists   

物理学家( physicist的名词复数 )

参考例句：

• For many particle physicists, however, it was a year of frustration. 对于许多粒子物理学家来说，这是受挫折的一年。 来自英汉非文学 - 科技
• Physicists seek rules or patterns to provide a framework. 物理学家寻求用法则或图式来构成一个框架。

4 ravens   

n.低质煤；渡鸦( raven的名词复数 )

参考例句：

• Wheresoever the carcase is,there will the ravens be gathered together. 哪里有死尸，哪里就有乌鸦麇集。 来自《简明英汉词典》
• A couple of ravens croaked above our boat. 两只乌鸦在我们小船的上空嘎嘎叫着。 来自辞典例句

5 beaks   

n.鸟嘴( beak的名词复数 )；鹰钩嘴；尖鼻子；掌权者

参考例句：

• Baby cockatoos will have black eyes and soft, almost flexible beaks. 雏鸟凤头鹦鹉黑色的眼睛是柔和的，嘴几乎是灵活的。 来自互联网
• Squid beaks are often found in the stomachs of sperm whales. 经常能在抹香鲸的胃里发现鱿鱼的嘴。 来自互联网

6 domesticated   

adj.喜欢家庭生活的；（指动物）被驯养了的v.驯化( domesticate的过去式和过去分词 )

参考例句：

• He is thoroughly domesticated and cooks a delicious chicken casserole. 他精于家务，烹制的砂锅炖小鸡非常可口。 来自《简明英汉词典》
• The donkey is a domesticated form of the African wild ass. 驴是非洲野驴的一种已驯化的品种。 来自《简明英汉词典》

7 amorous   

adj.多情的；有关爱情的

参考例句：

• They exchanged amorous glances and clearly made known their passions.二人眉来眼去，以目传情。
• She gave him an amorous look.她脉脉含情的看他一眼。

8 intestine   

adj.内部的；国内的；n.肠

参考例句：

• This vitamin is absorbed through the walls of the small intestine.这种维生素通过小肠壁被吸收。
• The service productivity is the function,including external efficiency,intestine efficiency and capacity efficiency.服务业的生产率是一个包含有外部效率、内部效率和能力效率的函数。

9 concocts   

v.将（尤指通常不相配合的）成分混合成某物( concoct的第三人称单数 )；调制；编造；捏造

参考例句：

• She concocts wonderful soup. 她调制美味的汤。 来自互联网
• To help his teammate, Krillin concocts an outlandish plan that you'll have to see to believe! 为了帮助他的战友，小林想出了一个绝妙的怪招。这可真是你必须亲眼见到才能相信的一招！ 来自互联网

10 embryo   

n.胚胎，萌芽的事物

参考例句：

• They are engaging in an embryo research.他们正在进行一项胚胎研究。
• The project was barely in embryo.该计划只是个雏形。

11 hyena   

n.土狼，鬣狗

参考例句：

• African hyena noted for its distinctive howl.非洲鬣狗，以其特别的嚎叫而闻名。
• The hyena's public image is not aided by its ridiculous appearance.鬣狗滑稽的外表无助于改善它在公众心中的形象。

12 hyenas   

n.鬣狗( hyena的名词复数 )

参考例句：

• These animals were the prey of hyenas. 这些动物是鬣狗的猎物。 来自辞典例句
• We detest with horror the duplicity and villainy of the murderous hyenas of Bukharinite wreckers. 我们非常憎恨布哈林那帮两面三刀、杀人破坏，干尽坏事的豺狼。 来自辞典例句