It is too low to fly satellites in since the friction from the small amount of air would destroy their orbits.

这一层太低不适合卫星运行，因为空气的摩擦力会破坏卫星的轨道。

youdao

This problem is made worse by the small amount of air that leaks into the cylinders around the rotary intake valve.

这个问题是加剧了少量的空气泄漏进入气缸的进气阀旋转。

youdao

The wide flammability range, 4% to 74% in air, and the small amount of energy required for ignition necessitate special handling to prevent the inadvertent mixing of hydrogen with air.

在空气中氢的易燃范围很宽，从4%到74%，而且点燃所需的能量很少，必须特别处理，以防止无意中把氢和空气混合在一起。

youdao

At about nineteen-thousand meters, the air is so thin and the amount of oxygen so small that a person needs a lot of special equipment to survive.

VOA: special.2011.04.06

Here's how it works: A small amount of diesel fuel is injected into the canister, where it is mixed with a tiny bit of air and ignited by an electrical spark.

FORBES: Clearing the Air