Outdatedness
n. outdated的变形
🗣️ 情景例句
Small world. I'm from Titusville, too.
世界真小。我也是从Titusville来的。
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。