the young man has a glorious future before him and the old one has a splendid future behind him:

青年人有光辉灿烂的前景，而老年人的辉煌已成为过去。

for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.

他们生怕别的公司的情报人员据此摸到他们可能要从事的某项科研项目。

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 although our faith in many of the things in which our forefathers fervently believed has weakened,

可是虽然我们对我们祖先笃信的许多事物已不太相信，

3 'I said it was a good idea all along.'

三、 我一直说这是个好想法。"

like adolescents they stand before the mirror,

犹如希腊神话中那位漂亮少年，