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给予者；赠与者；提供者
You can refer to a person or organization that gives or supplies a particular thing as a giver of that thing.
例句
Germany is the largest giver of aid among the wealthy countries of the West.
德国是西方富裕国家中给予援助最多的国家。
...a complex social ritual that says a lot about both the giver and the receiver.
关于捐赠者与受援者的复杂的社会礼仪