Omphacite
绿辉石
🗣️ 情景例句
My boss thinks I'm a machine.
我的老板把我当机器使唤。
Do not swap horses when crossing a stream.
处在危难中，不宜大更动。
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。