1. Without the air to hold some of the sun´s heat, the earth would be freezing cold at night, too cold for us to live. 2
    如果没有空气储存大部分太阳热量，地球在夜晚就会冻得冰冷，人们便无法生存。

2. Freezing winter is harmful to orange trees.
    冰冻天气对桔子树是有害的。