精选优质文档-倾情为你奉上AWindeven the slightest of winds can prevent frost (霜冻).Thats because wind is like a spoon in your cup of tea: it stirs （搅起）things down and brings down a lot of warm air that often floats just above housetops and trees .It may seem strange , but ice itself sometimes can protect crops from frost . Some growers actually spray their crops with water on a freezing night . Water freezes quickly on plants and then a strange thing happens . As long as ice stays wet , it cant g
