🗣️ 情景例句
Does Richard Stewart live here?
Richard Stewart住这吗？
It is probably only the flu (influenza).
可能只是流行性感冒吧。
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。