Vasodentin
[医] 血管性牙质
🗣️ 情景例句
Oh, let me think for a minute.
哦，让我想一下。
It was not as good as I had expected.
那不如我想象的好。
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。