也就是说，2%的空中运输量占总价值的35%：轻而昂贵的货物如高端电子元件往往走空运这条路。

That said, the 2% by volume that goes by air accounts for around 35% of the value: light, expensive goods such as high-end electronic components tend to be flown.

youdao

在货物运输所耗的时间中，空中占8%，地面操作占92%。

Ground handling cost the 92% time of air cargo transportation, as air traveling only cost 8%.

youdao

在飞机飞行的14公里高空中，大气压力就只占它在地面上的15%。

Where jets fly, 14 kilometres high, the atmospheric pressure is only 15 per cent of what it is on the ground.

youdao