When I was a teenager, I felt that I was just young and uncertain --

我十几岁时，总感到自己年轻，有些事拿不准 --

Yet a great many processes depending on such research are sought for with complete secrecy until the stage at which patents can be taken out.

然而，依赖这种研究的很多工艺程序是在完全保密的情况下进行的，直到可以取得专利权的阶段为止。

Snakes did not acquire their poison for use against man but for use against prey such as rats and mice, and the effects on these of viperine poison is almost immediate.

因为蛇有毒液不是用来对付人的，而是对付它的猎物，诸如鼠类，毒液对这些猎物会立刻起作用。

right living, and the need for abandoning bad habits etc.,

生活有规律、需要克服坏习惯等等，

It is the one world in the Solar System that is most like the Earth.

火星是太阳系里与地球最接近的一颗行星。

Normal people tend to forget this process unless and until they are reminded of it.

衰老的过程，不经提起，正常人容易忘记；一经提醒，才会记起。