Was he in the troposphere , stratosphere , mesosphere or thermosphere ?
他在对流层、平流层、中间层还是电离层？
Measurements and analyses of ozone concentrations at the ground surface and in the lower troposphere in southwest china .
我国西南地区地面和低层大气臭氧的观测分析。
The stratosphere sits on top of the troposphere , the lowest , densest layer of the atmosphere .
平流层位于离地面最近、密度最大的气层对流层之上。
This is because the top of the troposphere is normally very cold , causing ascending water vapour to freeze into ice crystals that drift and fall , rather than continuing up into the stratosphere .
这是因为对流层的顶端通常极其寒冷，上升的水蒸汽凝结成飘落而下的冰晶，而没有继续上升进入平流层。
Above the troposphere , seen as a light blue band with white clouds , is the stratosphere , part of the earth 's atmosphere where airplanes fly and some hardy bacteria float .
