Begans
(began 的复数) begin的过去式
🗣️ 情景例句
She cheated on the examination.
她考试作弊。
Just forget about it.I never did like it anyway.
别把这件事放在心上。我本来就不喜欢这桌布。
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。