So was born the echo-sounding apparatus, now in general use in ships.

这样就产生了目前各种船舶上普遍应用的回声探测仪。

small at first, narrowly contained within its banks,

开始很小，被紧紧地夹在两岸中间，

It is fairly clear that sleeping period must have some function,

很清楚，睡眠必然具有某种作用。

Then the cannons of the anchored warships thundered a salute to which the Vasa fired in reply.

这时，停泊在港口的其他战船向瓦萨号鸣炮致礼，瓦萨号也鸣炮回礼。

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？

in the end, is reabsorbed into the great ocean of life.

但最终又被重新融进生命的大洋。