初中范围带介词to的英语短语

　　Heidi in her transport was running to and fro: "Grandfather, come out!"

　　海蒂在路上里跑来跑去，喊着：“爷爷，快出来！”

　　The streets were filled with people running to and fro about their tasks.

　　街上满是为了工作跑来跑去的人。

　　Here the wind was roaring through the branches and the tree-tops were swaying to and fro.

　　风呼啸着吹过树枝，树冠来回摇摆。