Detectaphone
n. 窃听器, 监听器
🗣️ 情景例句
He bites off more than he can chew.
贪多嚼不烂。
Coming events cast their shadows before them.
山雨欲来风满楼。
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
测出回声间隔的时间，便可算出该处海洋的深度。