Binman
n. 垃圾工, 清洁工人
🗣️ 情景例句
I shall do as I please.
我喜欢怎么做就怎么做。
Did you go to the bank last night?
你昨晚去银行了吗？
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。