April Fool's Day ／All Fool's Day 愚人节

practical joke 恶作剧

hoax 骗局、恶作剧

spreading hoax 散布谣言

It's not a legal holiday, and its exact origins remain a mystery.

它不是法定节日，而且关于它的起源，也没有一个确切的说法。

replace cookie filling with toothpaste

把饼干的夹心换成牙膏

coat a bar of soap in clear nail polish

给肥皂涂上一层透明指甲油