Biternary
[计] 双三进制
🗣️ 情景例句
Keep smiling! things will calm down.
乐观一点，事情会平息下来的。
To notice the table
注意到桌子
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。