Variation problem
[计] 变分问题
🧩 词语组成解析
🗣️ 情景例句
We aren't going, for the simple reason that we can't afford it.
我们不去，原因很简单，我们负担不起。
We should let him face the music.
我们应该让他对自己所做的事负责任。
they are not prepared even to admit the possibility that noise affects people.
甚至不愿承认噪音可能对人有影响。