translation.en: But there might be some changes in store that you might not imagine. For example, planes require more runway for takeoff because the heated, less dense air, provides for less lift.
translation.zh: 但是与此同时可能有 你不能预测的变化。比如， 飞机需要更多的跑道去起飞， 因为高温，不稠密的空气，不能提供足够的升力。