Mastoid cavity
[医] 乳突腔
🧩 词语组成解析
a. 乳头状的\\nn. 乳突
🗣️ 情景例句
Here is a copy of all the things we need to start with.
这是我们一开始就需要的所有东西的清单。
Let's see you do it!
有本事你做给我看！
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。