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广告风景
🗣️ 情景例句
This is a little difficult for her.
这对她来说有点不习惯。
I have no money.
我一文不名。
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。