英语情景对话：
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，但是我忍不住。
地道表达
【地道短语】
to and fro
【解词释义】
该习语的意思是“来来回回”。To-and-fro是其名词形式，意思是“来来回回的运行”。
【支持范例】
He was bowing to and fro.
他一个劲儿地点头哈腰。
Those boats are prepared for waftage to and fro.
那些船舶是准备用来来回运送货物的。
Trucks and cars were shuttling to and fro on the highways.
公路上卡车和汽车正来往奔驰穿梭。
She swung to and fro on the swing.
她在秋千上摆来摆去。
英语学习笔记：
worry about
【释义】
担心，烦恼
【范例】Don't worry about me. Just carry on.
别为我担心，只管进行下去。
Let them worry about how to get rid of the cars later.
让他们在日后为处理车子而发愁吧。
after all
【释义】
毕竟，终究
【范例】
After all, nearly everyone spends money on some hobby or other.
话说回来，几乎每个人都要花点钱在某种嗜好上面的。
After all, you've your own master and I have no claims upon you.
总而言之，你就看着办吧，我没有权要求你什么。
口语句型
This is the first time sb does something.
【释义】
这是某人第一次做某事。
【范例】
This is the first time Zhangyimou has worked with Hong Kong actors.
这是张艺谋首次和香港演员合作。
This is the first time I have gone to a big party in America.
这是我在美国第一次参加大型聚会
