《邶风·燕燕》中写道:“燕燕于飞,差池其羽。之子于归,远送于野。瞻望弗及,泣涕如雨。燕燕于飞,颉之颃之。之子于归,远于将之。瞻望弗及,伫立以泣。燕燕于飞,下上其音。之子于归,远送于南。瞻望弗及,实劳我...