Isogradient
等梯度线
🗣️ 情景例句
Perhaps I will.
也许吧。
Please think nothing of it.
别挂在心上。
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。