Variation principle
[计] 变分原理
🧩 词语组成解析
🗣️ 情景例句
Your grandfather went to the Engineering School there.
你爷爷进那个工学院。
We should promote world peace.
我们应该促进世界和平。
Let us suppose that you are preparing a meal and keeping an eye on the baby at the same time.
假设你在做饭，同时又在照看孩子。