A：Why are you walking to and fro in the room?为什么一直在房间里走来走去的?
B：I’m worrying about the children. After all this is the first time they have been out without us.我为孩子们担心。毕竟他们是第一次离开我们，走出家门。
A：Don’t worry. They are grown-ups.别担心了，他们已经长大了。
B：I know. But I couldn’t help.我知道，但是。