“充当的”用英语怎么说

夫妻间应该偶尔 ( 彼此 ) 对调充当的角色.Husband and wife should switch roles ( with each other ) occasionally.了解工艺改善中试验设计能充当的角色.To understand the role that designed experiments can play in process improvement.他们已经同土著人谈过几次. 向导充当的翻译.They h...