Permant
帕马特低膨胀系数
🗣️ 情景例句
I have tea with y colleagues in the afternoon.
下午我和同事喝茶。
I'm sick and tired of my monotonous life.
我对自己的单调生活感到厌倦。
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。