广播电视英语短句 第 223 课：冷空气损害-4

Moisture soil absorbs more heat than loose dry soil covered with more mulch or vegetation. 潮湿的土壤比松散的土壤更能汲取热量，干燥的土壤用更多的护根或植物覆盖。

University of Arizona extension experts say covering plants and small trees with cloth or paper can help prevent frost damage. 亚利桑那扩展大学的专家说用外套和纸覆盖作物和小树能帮助防止冰冻灾害。

A one-hundred watt light bulb designed for outdoor use can also provide warmth. 为户外使用设计的100瓦的灯泡也能提供温暖。

Some people place Christmas lights on young trees for warmth. 为了温暖一些人在小树上防止了圣诞灯。

The bulbs should hang below the leaves to let the heat rise into the tree. 灯泡应该挂在树叶下面，让热量散发到树里。