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This echo-location in bats is often compared with radar, the principle of which is similar.

蝙蝠這種回聲定位常常可與雷達相比較，其原理是相似的。

An individual human existence should be like a river----

個人的存在應該像一條河流，

It did not;

其實沒有。

were portrayed to stir the imaginations of the superstitious sailors of the day.

以激起當時崇尚迷信的水手們的想像。

and today we can see even his famous clash with the Inquisition in something like its proper perspective.

甚至他和宗教法庭的著名沖突，我們今天也能正確如實地看待。

of becoming more likely to die the older we get, was something self-evident,

人隨著年齡的增長而接近死亡，這是不言而喻的，