Opps
(opp 的第三人称 -s形式) abbr. 定向聚丙烯
🗣️ 情景例句
There's no doubt about that.
此事确定无疑。
An idle brain is the devil's workshop.
游手好闲是万恶之源。
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。