Birefracting
[机] 双重折射的
🗣️ 情景例句
A whole day's work.
一整天的成果呀。
A lion at home, a mouse abroad.
在家凶如狮，在外却如鼠。
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。