Firstname
n. 名
🗣️ 情景例句
You got that part right.
你们这一部份猜对了。
What do you want to be after school?
当你完成学业以后，你要做什么？
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。