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1.A group called Mars One has appealed for would-be Mars astronauts from around the world.
appeal for 恳求，请求；要求
His remarks amounted to an indirect appeal for economic aid.
他的话相当于拐弯抹角地请求经济援助。
This is not another appeal for famine relief.
这不是为赈济饥荒的又一次募捐。
