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

　　海蒂在路上里跑來(lái)跑去，喊著(zhù)：“爺爺，快出來(lái)！”

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

　　街上滿(mǎn)是為了工作跑來(lái)跑去的人。

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

　　風(fēng)呼嘯著(zhù)吹過(guò)樹(shù)枝，樹(shù)冠來(lái)回搖擺。