Book IV chapter 2

We have thus stated for what reason the one becomes female and the other male. Observed facts confirm what we have said. For more females are produced by the young and by those verging¹ on old age than by those in the prime of life; in the former the vital heat is not yet perfect, in the latter it is failing. And those of a moister and more feminine state of body are more wont² to beget³ females, and a liquid semen causes this more than a thicker; now all these characteristics come of deficiency in natural heat.

Again, more males are born if copulation takes place when north than when south winds are blowing. For in the latter case the animals produce more secretion⁴, and too much secretion is harder to concoct⁵; hence the semen of the males is more liquid, and so is the discharge of the catamenia.

Also the fact that the catamenia occur in the course of nature rather when the month is waning⁶ is due to the same causes. For this time of the month is colder and moister because of the waning and failure of the moon; as the sun makes winter and summer in the year as a whole, so does the moon in the month. This is not due to the turning of the moon, but it grows warmer as the light increases and colder as it wanes⁷.

The shepherds also say that it not only makes a difference in the production of males and females if copulation takes place during northern or southerly winds, but even if the animals while copulating look towards the south or north; so small a thing will sometimes turn the scale and cause cold or heat, and these again influence generation.

The male and female, then, are distinguished⁸ generally, as compared with one another in connexion with the production of male and female offspring, for the causes stated. However, they also need a certain correspondence with one another to produce at all, for all things that come into being as products of art or of Nature exist in virtue⁹ of a certain ratio. Now if the hot preponderates¹⁰ too much it dries up the liquid; if it is very deficient¹¹ it does not solidify¹² it; for the artistic¹³ or natural product we need the due mean between the extremes. Otherwise it will be as in cooking; too much fire burns the meat, too little does not cook it, and in either case the process is a failure. So also there is need of due proportion in the mixture of the male and female elements. And for this cause it often happens to many of both sexes that they do not generate with one another, but if divorced and remarried to others do generate; and these oppositions¹⁴ show themselves sometimes in youth, sometimes in advanced age, alike as concerns fertility or infertility¹⁵, and as concerns generation of male or female offspring.

One country also differs from another in these respects, and one water from another, for the same reasons. For the nourishment¹⁶ and the medical condition of the body are of such or such a kind because of the tempering of the surrounding air and of the food entering the body, especially the water; for men consume more of this than of anything else, and this enters as nourishment into all food, even solids. Hence hard waters cause infertility, and cold waters the birth of females.

1 verging   

接近，逼近（verge的现在分词形式）

参考例句：

• He vowed understanding, verging on sympathy, for our approach. 他宣称对我们提出的做法很理解，而且近乎同情。
• He's verging on 80 now and needs constant attention. 他已近80岁，需要侍候左右。

2 wont   

adj.习惯于；v.习惯；n.习惯

参考例句：

• He was wont to say that children are lazy.他常常说小孩子们懒惰。
• It is his wont to get up early.早起是他的习惯。

3 beget   

v.引起；产生

参考例句：

• Dragons beget dragons,phoenixes beget phoenixes.龙生龙，凤生凤。
• Economic tensions beget political ones.经济紧张导致政治紧张。

4 secretion   

n.分泌

参考例句：

• Is there much secretion from your eyes?你眼里的分泌物多吗？
• In addition,excessive secretion of oil,water scarcity are also major factors.除此之外，油脂分泌过盛、缺水也都是主要因素。

5 concoct   

v.调合，制造

参考例句：

• I gave her a tip on how to concoct a new kind of soup.我教她配制一种新汤的诀窍。
• I began to concoct explanations of my own.我开始思考自己的解释。

6 waning   

adj.（月亮）渐亏的，逐渐减弱或变小的n.月亏v.衰落( wane的现在分词 )；（月）亏；变小；变暗淡

参考例句：

• Her enthusiasm for the whole idea was waning rapidly. 她对整个想法的热情迅速冷淡了下来。
• The day is waning and the road is ending. 日暮途穷。 来自《现代汉英综合大词典》

7 wanes   

v.衰落( wane的第三人称单数 )；（月）亏；变小；变暗淡

参考例句：

• The moon waxes till it becomes full, and then wanes. 月亮渐盈，直到正圆，然后消亏。 来自《现代汉英综合大词典》
• The moon waxes and wanes every month. 月亮每个月都有圆缺。 来自《简明英汉词典》

8 distinguished   

adj.卓越的，杰出的，著名的

参考例句：

• Elephants are distinguished from other animals by their long noses.大象以其长长的鼻子显示出与其他动物的不同。
• A banquet was given in honor of the distinguished guests.宴会是为了向贵宾们致敬而举行的。

9 virtue   

n.德行，美德；贞操；优点；功效，效力

参考例句：

• He was considered to be a paragon of virtue.他被认为是品德尽善尽美的典范。
• You need to decorate your mind with virtue.你应该用德行美化心灵。

10 preponderates   

v.超过，胜过( preponderate的第三人称单数 )

参考例句：

• This reason preponderates over all others. 这个理由较所有其他理由重要。 来自辞典例句

11 deficient   

adj.不足的，不充份的，有缺陷的

参考例句：

• The crops are suffering from deficient rain.庄稼因雨量不足而遭受损害。
• I always have been deficient in selfconfidence and decision.我向来缺乏自信和果断。

12 solidify   

v.(使)凝固，(使)固化，(使)团结

参考例句：

• Opinion on this question began to solidify.对这个问题的意见开始具体化了。
• Water will solidify into ice if you freeze it.水冷冻会结冰。

13 artistic   

adj.艺术(家)的，美术(家)的；善于艺术创作的

参考例句：

• The picture on this screen is a good artistic work.这屏风上的画是件很好的艺术品。
• These artistic handicrafts are very popular with foreign friends.外国朋友很喜欢这些美术工艺品。

14 oppositions   

（强烈的）反对( opposition的名词复数 )； 反对党； （事业、竞赛、游戏等的）对手； 对比

参考例句：

• That's fine because all perihelic oppositions of Mars are spectacular. 但它和最近的几次区别不大，因为火星所有的近日对冲都很壮观。
• He tried his best to bear down all of his oppositions. 他尽全力击败一切反对意见。

15 infertility   

n.不肥沃，不毛；不育

参考例句：

• It is the Geneva, Switzerland-based Biotech Company's second recombinant infertility drug. 它是瑞士生物技术公司在日内瓦的公司生产的第二种重组治疗不孕症的药。 来自英汉非文学 - 生命科学 - 生物技术制药疫苗
• Endometritis is a cause of infertility. 子宫内膜炎是不育的原子。 来自辞典例句

16 nourishment   

n.食物，营养品；营养情况

参考例句：

• Lack of proper nourishment reduces their power to resist disease.营养不良降低了他们抵抗疾病的能力。
• He ventured that plants draw part of their nourishment from the air.他大胆提出植物从空气中吸收部分养分的观点。