广播电视英语短句 第 223 课：冷空气损害-6

If you spray a tree, keep the water away from nearby power lines. 如果你往树上喷水，保持水与动力线的距离。

Heavy ice can form and break them. 沉重的冰能使它们变形和损毁。

You can also wrap a tree in palm tree frond leaves, cornstalks or fiberglass. 你也能用棕榈树叶、秸秆或玻璃纤维包裹树。

Adding plastic film works well in rain and snow. 在雨天或雪天最好增加塑料薄膜。

But experts say plastic alone does not help much. 但是专家说只有塑料薄膜没有多少用处。