Effectivity
n. 有效, 功效
🗣️ 情景例句
I'm leaving for Beijing on a four-day tour.
我马上要去北京旅游4天。
Guess! I hope you'll like it.
猜猜看！我想你会中意的。
I thought you could do a better job.
我以为你的表现会更好。