Ppss
(pps 的复数) [计] 脉冲/秒
🗣️ 情景例句
When you learn a new verb, learn its various forms.
学到了新动词时，记住它的各种形式。
Bottoms up!
干杯！
and we know something of the great variety of the sea bed's topography.
而且我们对海底地形的千变万化也有了一定的了解。