Quadratic variational problems
[计] 二次变分问题
🗣️ 情景例句
Do you have a cell phone?
你有手机吗?
Would you know your daughter, see her in company.
若要知道你女儿,且看她和谁交往。
I must go to the grocer's.We haven't got much tea or coffee, and we haven't got any sugar or jam.
我得去一下食品店。我们的茶叶和咖啡不多了,糖和果酱也没有了。
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