广播电视英语短句 第 223 课：冷空气损害-5

Cold is specially dangerous to citrus trees. 寒冷对柑橘树特别危险。

Agricultural specialists at the University of California suggest putting paper or cloth around the trunk and central branches of young citrus trees. 加利福尼亚大学的农业专家建议用纸和外套包裹小柑橘树的树枝和树干。

In Florida, as temperatures fell to record lows, citrus growers sprayed water on their trees to help prevent freeze damage. 在佛罗里达州，当温度跌破最低纪录时，柑橘种植者在他们的树上喷水来防止冰冻灾害。

Jim Bottcher is a master gardener with the University of Florida extension. 吉姆是佛罗里达扩展大学的主园丁。

He explains that as the water freezes, it produces heat, and the ice forms a protective blanket around the tree. 他解释因为水结冰产生热，而且冰围绕着数形成一个保护罩。