Infertilitas
[医] 不生育, 不育症
🗣️ 情景例句
He is new at the work to the work.
他没有做这项工作的经验。
I get to work at nine o'clock every morning.
我每天早上9点钟上班。
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。