buy y up尽可能买进;全买
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PHRASAL VERB（动词词组） If you buy up land, property, or a commodity, you buy large amounts of it, or all that is available. 全部 (或尽量) 买下
The mention of price increases sent citizens out to buy up as much as they could.
价格上涨的风声使得民众外出抢购尽可能多的东西。