and that is one of the things the young are busily engaged in seeking.

这正是年轻人所热衷追求的。

from which can be seen the strata the drill has been cutting through.

从中能看出钻头所钻透的地层。

If it is not a question of resting the body, then perhaps it is the brain that needs resting? This might be a plausible hypothesis were it not for two factors.

如果睡眠的功能不是在于使身体得到休息，那么也许是让大脑得以休息？若不是下面两点，这种假使似乎是有道理的。

but a medicine that had worked so well in one form of illness would surely be of equal benefit in another,

只知道一种药对一种病有好处，肯定对另一种病也会有好处。

But can we blame those who looked and failed to see what Galileo saw, if we remember that to use a telescope at the limit of its powers calls for long experience and intimate familiarity with one's instrument?

但是，如果我们想到，便用一架倍数有限的望远镜需要长期的经验和对自己仪器的熟悉程度，那么我们怎么能去责备观察了天空但没有看到伽利略所看到的东西的那些人呢？

good-tempered elephant who will give many years of loyal service.

脾气温顺、能忠实为人服务多年的大象。