Majorant
强[控制]函数, 优函数
🗣️ 情景例句
And plus, if you are not completely satisfied, you can return it to us.
并且，如果您不是百分百的满意，你可以将产品退还给我们。
Yes,you are.
是的，你是。
On which ones?
哪几个品目呢，