防雪栅栏

例句：

1. 1. The farmer built a fence to keep the sheep from wandering into the field.
   农民建了一道篱笆，防止羊跑到田野里。
2. 2. The old man used to live by the river, but now he has a fence around his house tokeep the children out.
   老人以前住在河边，但现在他给房子周围装上了篱笆，不让孩子们进去。
3. 3.The construction workers had to erect a new fence for the new playground.
   建筑工人不得不为新的操场搭建新栅栏。