They spend their days underground 它们白天呆在地下

110. this strategy would not be enough for survival.
     光凭这些手段还不足以在此生存
111. The extraordinary ears of the fennec foxes of Africa radiate heat
     非洲的耳廓狐长有奇特的大耳 它们能散发热量
112. but the animals have another way of keeping cool.
     不过动物也有其它保持凉爽的方法
113. They spend their days underground
     它们白天呆在地下
114. and only emerge at sunset.
     直到日落之后才会出现
115. Darkness brings huge changes.
     夜晚的情况变得很不一样
116. In the Sahara the temperature can drop as much as 30 degrees during the night,
     在撒哈拉沙漠中 晚上的气温会下降整整30℃

来自《行星地球 第一季 第五集 Planet Earth S01E05 沙漠》第 113 行