A：Why are you walking to and fro in the room?為什么一直在房間里走來走去的?
    B：I’m worrying about the children. After all this is the first time they have been out without us.我為孩子們擔(dān)心。畢竟他們是第一次離開我們，走出家門。
    A：Don’t worry. They are grown-ups.別擔(dān)心了，他們已經(jīng)長大了。
    B：I know. But I couldn’t help.我知道，但是我忍不住。