Effectivity
n. 有效, 功效
🗣️ 情景例句
Wrap him in the blanket, Dad!
用毯子把他裹好， 爸爸！
I used to be a pilot. Now, I'm a parachutist.
我曾经做过飞行员，如今是伞兵了。
I often watch TV, but sometimes I read.
我经常看电视，有时看书。