Metanometer
甲烷计
🗣️ 情景例句
Thank you all the same.
不管怎样都要谢谢你。
Well, put something else on.
嗯，换一件吧。
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。