to

prep.

向，朝着；到；关于；属于

adv.

朝一个方向的；到某种状态；关闭；

to and fro来回地

1. This will be a great boost to the economy.
   这对于经济发展将是一个巨大的促进。
2. We come here to see you .
   我们来这里是为了看你。
3. Her dress reached down to her ankles.
   她的连衣裙垂至脚踝。
4. This road leads to London.
   这条路通向伦敦。
5. My mother wrote to me every month.
   我的母亲每月给我写信。

1. He is walking to and fro in the room.
   他在房间内踱来踱去。
2. Push the door to.
   把门关上。

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