1. This echo-location in bats is often compared with radar,the principle of which is similar.
    蝙蝠的回声定位常常可与雷达比较,其原理是一样的.

2. This echo-location in bats is often compared with radar, the principle of which is similar.
    人们常把蝙蝠的这种回声定位与雷达相比较, 因为它们的原理是相似的.

3. This echo-location in bats is often compared with radar, the principle of which is similar.
    蝙蝠这种回声定位常常可与雷达相比较，其原理是相似的。

4. And we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
    我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。

5. She had never known her thoughts to be so confused; like the bats now above her, her thoughts quickly flew this way and that.
    思绪从未这么乱过，就像头顶飞着的蝙蝠一样，忽东忽西。

6. Extraordinary discovery of echo-location in bats to see a case in which the vioce plays a strictly utilitarian role.
    我们只要从蝙蝠的回声定位这一项非凡的发明中, 就能看到声音起的纯粹实用作用的例子.

7. Unlike most other bats, this species is diurnal.
    这种蝙蝠与大多数蝙蝠不同, 是在日间活动的.

8. It has been found that certain bats emit squeaks and by receiving the echoes,
    人们发现，某些蝙蝠能发出尖叫声，并能通过回声

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