Electromagnetic contactor
[化] 电磁接触器
🗣️ 情景例句
Let the hands get busy, not the mouth.
手要勤劳,嘴莫多说。
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。
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