Quadrifid
a. 分成四部分的
🗣️ 情景例句
That's not what I had in mind.
我想要的可不是这个。
We would like to ask you to come here for an interview.
我们想约你来参加面试。
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。