Vdd
[计] 版本说明文档
🗣️ 情景例句
Has the container arrived in Sydney yet?
货柜已经到达悉尼了吗？
To worry
烦恼，担心
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。