The bloodless animals do not agree either with the sanguinea or with each other in the fashion of the parts contributing to generation. There are four classes still left to deal with, first the crustacea,
secondly1 the cephalopoda, thirdly the insects, and fourthly the testacea. We cannot be certain about all of them, but that most of them copulate is plain; in what manner they unite must be stated later.
The crustacea copulate like the retromingent quadrupeds, fitting their tails to one another, the one supine and the other
prone2. For the flaps attached to the sides of the tail being long prevent them from uniting with the
belly3 against the back. The males have fine spermatic ducts, the females a
membranous4 uterus alongside the
intestine5, cloven on each side, in which the egg is produced.
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1
secondly
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| adv.第二，其次 |
参考例句： |
- Secondly,use your own head and present your point of view.第二，动脑筋提出自己的见解。
- Secondly it is necessary to define the applied load.其次，需要确定所作用的载荷。
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2
prone
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| adj.(to)易于…的，很可能…的；俯卧的 |
参考例句： |
- Some people are prone to jump to hasty conclusions.有些人往往作出轻率的结论。
- He is prone to lose his temper when people disagree with him.人家一不同意他的意见,他就发脾气。
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3
belly
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| n.肚子，腹部；(像肚子一样)鼓起的部分，膛 |
参考例句： |
- The boss has a large belly.老板大腹便便。
- His eyes are bigger than his belly.他眼馋肚饱。
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4
membranous
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| adj.膜的，膜状的 |
参考例句： |
- Others are born live, after struggling to break free from a membranous egg sac. 其余的是冲破膜状蛋囊而出生的。 来自电影对白
- Thellos thellon, membranous layer of life is our only home. 薄薄的膜层就是咱们独一的家园。 来自互联网
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5
intestine
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| 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。
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