Operativeness
n. operative的变形
✅ 同义词
🗣️ 情景例句
I know it.
我知道。
Just a second and I'll check the schedule.
请等一等，我来查一下时刻表。
it is quite reasonable to regard the sea floor as the basic form of the crust of the earth,
因此完全有理由把海床看作地壳的基本模壳，