短語(yǔ)詞組短語(yǔ)ownership p retention 所有權(quán)的保畱ownership s retention 所有權(quán)保畱ownership retention purchase 所有權(quán)保畱買(mǎi)賣(mài)ownership retention system 所有權(quán)保畱制度retention of ownership 所有權(quán)保畱 返回 ownership retention