Efficaciousness
n. 有效;灵验
🗣️ 情景例句
If I work hard now, when I retire I'll be very well off financially.
如果我现在努力工作的话，退体后就会很富有。
We never know the worth (or value) of water till the well is dry.
井枯方知水可贵。
Why were you shouting?
你为什么大声喊？