Variation problem
[计] 变分问题
🧩 词语组成解析
🗣️ 情景例句
I go camping in the mountains to enjoy the fresh air.
我去山中宿营以享受新鲜的空气。
How are you feeling today?
你今天感觉怎么样？
Thousands joined him when he led a march to the coast, with the purpose of making a little salt when he reached the sea.
为了生产一点盐，他带领游行队伍向海滨前进，当他们到达海滨时，成千上万的人参加了进来。