1. The heavy frost in late spring was ruinous to the crops.
    暮春的严霜对庄稼危害极大。

2. Young plants are often killed by frost.
    植物的幼苗常因严寒而冻死.

3. U.S. growers got a break this Valentine's Day; a recent frost killed 25% of Colombia's rose crop.
    今年的情人节，美国的玫瑰种植商碰上了好运气：一场霜冻摧毁了哥伦比亚25%的玫瑰。