Deradelphus
并头联胎
🗣️ 情景例句
but just right for us.
但正好够我们住。
It's a long story.
说来话长。
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。