3.At dinner,the young can't start eating until the oldest or the most respected begins to eat. 一用餐时，只有老人和有地位的人开始进餐时，年青人才 可以开始吃。3.At dinner, the young can’t start eating until the oldest or the most respected begins to eat. -- 用餐时，只有老人和有地位的人开始进餐时，年青人才 可以开始吃