Efficaciousness
n. 有效;灵验
🗣️ 情景例句
You give me the money and I'll give you the goods.
你付钱，我给货。
After dinner sit a while, after supper walk a while.
午饭后要坐，晚饭后要走。
Oh, this is my cat, Mimi!
这是我的小猫咪咪。