Efficaciousness
n. 有效;灵验
🗣️ 情景例句
I don't know why I didn't think of it.
我不知道为什么我没有想到这一点。
The school is just around the corner.
学校只在拐角附近。
Sure, Mom. I'll get some at once.
好的，妈妈。我这就去。