Earbud
n. 耳塞
🗣️ 情景例句
Simple.
简单明 。
The poet creates pictures with words.
诗人用语言创造万物。
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。