upper atmosphere

• 上层大气,高空大气

upper atmosphere的用法和样例：

例句

1. "A sweet temper" is a figurative expression, but "sweet coffee" is not.
   "甜蜜的性情"是个比喻的说法，而"甜咖啡"则不是。
2. Particle concentrations in the upper atmosphere drop regularly as the altitude rises.
   在高层大气中粒子浓度随高度的增加而有规律地下降。
3. As the final days ticked by, a dust storm on the planet erupted, reducing the density of the upper atmosphere.
   在最后几天的倒数计时中，火星上却刮起了一场沙尘暴，导致高层大气的密度降低。