同温层

例句：

1. 1.The astronauts were studying the atmosphere of the earth's stratosphere.
   宇航员正在研究地球的同温层大气。
2. 2.The meteorologists use satellites to observe the atmospheric conditions in the thermosphere.
   气象学家使用卫星观察热层中的大气条件。
3. 3.The research into the upper atmosphere is crucial for understanding climate change.
   对上层大气的研究对于理解气候变化至关重要。