Marx
[ ['mɑ:ks] ]
第4级
其它 Other
n. 马克思（无产阶级的伟大领袖）
🗣️ 情景例句
Yes, Sam?
什么事 ，Sam？
How annoying!
真讨厌！
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。