survival conditions

例句：

1. 1.The survival conditions in the desert are harsh and unforgiving.
   沙漠的生存条件非常严酷且无情。
2. 2.The survival conditions of the species depend on the availability of food and water.
   该物种的生存条件取决于食物和水的可用性。
3. 3. The survival conditions for humans have improved significantly over the past century.
   人类的生存条件在过去一个世纪内得到了显著改善。