Book II Chapter 9

Smell and its object are much less easy to determine than what we have hitherto discussed; the distinguishing characteristic of the object of smell is less obvious than those of sound or colour. The ground of this is that our power of smell is less discriminating¹ and in general inferior to that of many species of animals; men have a poor sense of smell and our apprehension² of its proper objects is inseparably bound up with and so confused by pleasure and pain, which shows that in us the organ is inaccurate³. It is probable that there is a parallel failure in the perception of colour by animals that have hard eyes: probably they discriminate⁴ differences of colour only by the presence or absence of what excites fear, and that it is thus that human beings distinguish smells. It seems that there is an analogy between smell and taste, and that the species of tastes run parallel to those of smells-the only difference being that our sense of taste is more discriminating than our sense of smell, because the former is a modification⁵ of touch, which reaches in man the maximum of discriminative⁶ accuracy. While in respect of all the other senses we fall below many species of animals, in respect of touch we far excel all other species in exactness of discrimination. That is why man is the most intelligent of all animals. This is confirmed by the fact that it is to differences in the organ of touch and to nothing else that the differences between man and man in respect of natural endowment are due; men whose flesh is hard are ill-endowed by nature, men whose flesh is soft, wellendowed.

As flavours may be divided into (a) sweet, (b) bitter, so with smells. In some things the flavour and the smell have the same quality, i.e. both are sweet or both bitter, in others they diverge⁷. Similarly a smell, like a flavour, may be pungent⁸, astringent⁹, acid, or succulent. But, as we said, because smells are much less easy to discriminate than flavours, the names of these varieties are applied¹⁰ to smells only metaphorically¹¹; for example ‘sweet’ is extended from the taste to the smell of saffron or honey, ‘pungent’ to that of thyme, and so on.

In the same sense in which hearing has for its object both the audible and the inaudible, sight both the visible and the invisible, smell has for its object both the odorous and the inodorous. ‘Inodorous’ may be either (a) what has no smell at all, or (b) what has a small or feeble smell. The same ambiguity¹² lurks¹³ in the word ‘tasteless’.

Smelling, like the operation of the senses previously¹⁴ examined, takes place through a medium, i.e. through air or water-I add water, because water-animals too (both sanguineous and non-sanguineous) seem to smell just as much as land-animals; at any rate some of them make directly for their food from a distance if it has any scent¹⁵. That is why the following facts constitute a problem for us. All animals smell in the same way, but man smells only when he inhales¹⁶; if he exhales¹⁸ or holds his breath, he ceases to smell, no difference being made whether the odorous object is distant or near, or even placed inside the nose and actually on the wall of the nostril¹⁹; it is a disability common to all the senses not to perceive what is in immediate²⁰ contact with the organ of sense, but our failure to apprehend²¹ what is odorous without the help of inhalation is peculiar²² (the fact is obvious on making the experiment). Now since bloodless animals do not breathe, they must, it might be argued, have some novel sense not reckoned among the usual five. Our reply must be that this is impossible, since it is scent that is perceived; a sense that apprehends²³ what is odorous and what has a good or bad odour cannot be anything but smell. Further, they are observed to be deleteriously effected by the same strong odours as man is, e.g. bitumen²⁴, sulphur, and the like. These animals must be able to smell without being able to breathe. The probable explanation is that in man the organ of smell has a certain superiority over that in all other animals just as his eyes have over those of hard-eyed animals. Man’s eyes have in the eyelids²⁵ a kind of shelter or envelope, which must be shifted or drawn²⁶ back in order that we may see, while hardeyed animals have nothing of the kind, but at once see whatever presents itself in the transparent²⁷ medium. Similarly in certain species of animals the organ of smell is like the eye of hard-eyed animals, uncurtained, while in others which take in air it probably has a curtain over it, which is drawn back in inhalation, owing to the dilating²⁸ of the veins²⁹ or pores. That explains also why such animals cannot smell under water; to smell they must first inhale¹⁷, and that they cannot do under water.

Smells come from what is dry as flavours from what is moist. Consequently the organ of smell is potentially dry.

1 discriminating   

a.有辨别能力的

参考例句：

• Due caution should be exercised in discriminating between the two. 在区别这两者时应该相当谨慎。
• Many businesses are accused of discriminating against women. 许多企业被控有歧视妇女的做法。

2 apprehension   

n.理解，领悟；逮捕，拘捕；忧虑

参考例句：

• There were still areas of doubt and her apprehension grew.有些地方仍然存疑，于是她越来越担心。
• She is a girl of weak apprehension.她是一个理解力很差的女孩。

3 inaccurate   

adj.错误的，不正确的，不准确的

参考例句：

• The book is both inaccurate and exaggerated.这本书不但不准确，而且夸大其词。
• She never knows the right time because her watch is inaccurate.她从来不知道准确的时间因为她的表不准。

4 discriminate   

v.区别，辨别，区分；有区别地对待

参考例句：

• You must learn to discriminate between facts and opinions.你必须学会把事实和看法区分出来。
• They can discriminate hundreds of colours.他们能分辨上百种颜色。

5 modification   

n.修改，改进，缓和，减轻

参考例句：

• The law,in its present form,is unjust;it needs modification.现行的法律是不公正的，它需要修改。
• The design requires considerable modification.这个设计需要作大的修改。

6 discriminative   

有判别力

参考例句：

• The measures are non-discriminative and not targeted at Mexican citizens. 有关措施并非针对墨西哥公民，没有歧视性。
• The Discriminative Common Vector (DCV) successfully overcomes this problem for FLDA. 近年来针对此问题提出了不同的解决方法，其中基于共同鉴别矢量(DCV)的方法成功克服了已有各种方法存在的缺点，有较好的数值稳定性和较低的计算复杂度。

7 diverge   

v.分叉，分歧，离题，使...岔开，使转向

参考例句：

• This is where our opinions diverge from each other.这就是我们意见产生分歧之处。
• Don't diverge in your speech.发言不要离题。

8 pungent   

adj.（气味、味道）刺激性的，辛辣的；尖锐的

参考例句：

• The article is written in a pungent style.文章写得泼辣。
• Its pungent smell can choke terrorists and force them out of their hideouts.它的刺激性气味会令恐怖分子窒息，迫使他们从藏身地点逃脱出来。

9 astringent   

adj.止血的，收缩的，涩的；n.收缩剂，止血剂

参考例句：

• It has an astringent effect.这个有止血的作用。
• Green persimmons are strongly astringent.绿柿子非常涩。

10 applied   

adj.应用的；v.应用，适用

参考例句：

• She plans to take a course in applied linguistics.她打算学习应用语言学课程。
• This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。

11 metaphorically   

adv. 用比喻地

参考例句：

• It is context and convention that determine whether a term will be interpreted literally or metaphorically. 对一个词的理解是按字面意思还是隐喻的意思要视乎上下文和习惯。
• Metaphorically it implied a sort of admirable energy. 从比喻来讲，它含有一种令人赞许的能量的意思。

12 ambiguity   

n.模棱两可；意义不明确

参考例句：

• The telegram was misunderstood because of its ambiguity.由于电文意义不明确而造成了误解。
• Her answer was above all ambiguity.她的回答毫不含糊。

13 lurks   

n.潜在，潜伏；（lurk的复数形式）vi.潜伏，埋伏（lurk的第三人称单数形式）

参考例句：

• Behind his cool exterior lurks a reckless and frustrated person. 在冷酷的外表背后，他是一个鲁莽又不得志的人。 来自《简明英汉词典》
• Good fortune lies within Bad, Bad fortune lurks within good. 福兮祸所倚，祸兮福所伏。 来自互联网

14 previously   

adv.以前，先前（地）

参考例句：

• The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
• Let me digress for a moment and explain what had happened previously.让我岔开一会儿，解释原先发生了什么。

15 scent   

n.气味，香味，香水，线索，嗅觉；v.嗅，发觉

参考例句：

• The air was filled with the scent of lilac.空气中弥漫着丁香花的芬芳。
• The flowers give off a heady scent at night.这些花晚上散发出醉人的芳香。

16 inhales   

v.吸入( inhale的第三人称单数 )

参考例句：

• Long, slow, full breaths with exhales at least as long as the inhales. 深长、缓慢、充分的呼吸，呼气至少要同吸气一样长。 来自互联网
• An impressive pile forms. Heywood bends down and inhales deeply, smelling the aroma. Rapture. 一小排香烟。海沃德低下头使劲地闻着香烟的气味，高兴不已。 来自互联网

17 inhale   

v.吸入(气体等)，吸(烟)

参考例句：

• Don't inhale dust into your lung.别把灰尘吸进肺里。
• They are pleased to not inhale second hand smoke.他们很高兴他们再也不会吸到二手烟了。

18 exhales   

v.呼出，发散出( exhale的第三人称单数 )；吐出（肺中的空气、烟等），呼气

参考例句：

• He shivers, exhales, gets the ball and races back to his friends. 他浑身一颤，舒了口气，捡起球，跑回到他的朋友们那里。 来自互联网
• A smoker exhales in a pub in Richmond, London. 一名吸菸者在伦敦瑞旗蒙一家酒吧吞云吐雾。 来自互联网

19 nostril   

n.鼻孔

参考例句：

• The Indian princess wore a diamond in her right nostril.印弟安公主在右鼻孔中戴了一颗钻石。
• All South American monkeys have flat noses with widely spaced nostril.所有南美洲的猴子都有平鼻子和宽大的鼻孔。

20 immediate   

adj.立即的；直接的，最接近的；紧靠的

参考例句：

• His immediate neighbours felt it their duty to call.他的近邻认为他们有责任去拜访。
• We declared ourselves for the immediate convocation of the meeting.我们主张立即召开这个会议。

21 apprehend   

vt.理解，领悟，逮捕，拘捕，忧虑

参考例句：

• I apprehend no worsening of the situation.我不担心局势会恶化。
• Police have not apprehended her killer.警察还未抓获谋杀她的凶手。

22 peculiar   

adj.古怪的，异常的；特殊的，特有的

参考例句：

• He walks in a peculiar fashion.他走路的样子很奇特。
• He looked at me with a very peculiar expression.他用一种很奇怪的表情看着我。

23 apprehends   

逮捕，拘押( apprehend的第三人称单数 )； 理解

参考例句：

• A guilty man apprehends danger in every sound. 犯了罪的人对每一个声音都感到风声鹤唳。
• The police maintain order in the city, help prevent crime, apprehends lawbreakers and directs traffic. 警察维持城市的秩序，协助防止犯罪，逮捕犯法者及指挥交通。

24 bitumen   

n.沥青

参考例句：

• Bitumen paper can be burnt to gain energy.沥青纸可以焚烧以获得能量。
• In fact,a speciality crude is suitable only for bitumen production.事实上，这种特性的原油只适宜于生产沥青。

25 eyelids   

n.眼睑( eyelid的名词复数 )；眼睛也不眨一下；不露声色；面不改色

参考例句：

• She was so tired, her eyelids were beginning to droop. 她太疲倦了，眼睑开始往下垂。
• Her eyelids drooped as if she were on the verge of sleep. 她眼睑低垂好像快要睡着的样子。 来自《简明英汉词典》

26 drawn   

v.拖，拉，拔出；adj.憔悴的，紧张的

参考例句：

• All the characters in the story are drawn from life.故事中的所有人物都取材于生活。
• Her gaze was drawn irresistibly to the scene outside.她的目光禁不住被外面的风景所吸引。

27 transparent   

adj.明显的，无疑的；透明的

参考例句：

• The water is so transparent that we can see the fishes swimming.水清澈透明，可以看到鱼儿游来游去。
• The window glass is transparent.窗玻璃是透明的。

28 dilating   

v.（使某物）扩大，膨胀，张大( dilate的现在分词 )

参考例句：

• Compliance is the dilating extent of elastic tissue below pressure. 顺应性是指外力作用下弹性组织的可扩张性。 来自互联网
• For dilating the bearing life, bearing should keep lubricative well. 为延长轴承寿命，轴承应保持良好的润滑状态。 来自互联网

29 veins   

n.纹理；矿脉( vein的名词复数 )；静脉；叶脉；纹理

参考例句：

• The blood flows from the capillaries back into the veins. 血从毛细血管流回静脉。 来自《简明英汉词典》
• I felt a pleasant glow in all my veins from the wine. 喝过酒后我浑身的血都热烘烘的，感到很舒服。 来自《简明英汉词典》