Pentacrinoid
长柄幼虫; 五角海百合
🗣️ 情景例句
What do your parents do?
你父母是做什么的？
To make up to mother
受母亲宠爱
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。