air travel

基本解释

Air travel itself carries only very minimal risks of infection with TB of any kind.
航空旅行本身只具有极小的感染任何类型结核的风险。
THE future of air travel does not have to bring yet more queues, gruelling delays and growing pollution.
航空旅行不一定非要在未来带来更多的长队、让人无法容忍的延误和加剧的污染。
They are a good way to cut air travel and carbon emissions, particularly where, as in China, they connect dense but distant population clusters.
高铁是减少航空旅行和碳排放的好途径，尤其在象中国这样的地方，它们连接了人口密集但偏远的地区。

The Department of Agriculture, for example, provides biologists to help study wildlife that could be a danger to air travel.
Somehow, if you could manufacture a really smooth frictionless surface, that if you took a hockey puck or something and an air cushion and you give it a push, in some idealized world, it'll travel forever.
如果你制造一个绝对光滑无摩擦的表面,然后在上面放个冰球或者别的什么,或者气垫,然后推它一下,在理想条件下,它会永远运动下去
耶鲁公开课 - 基础物理课程节选
Another reason for the increase in bird strikes is the growing popularity of air travel in the United States.

Cambodia Airlines is only the latest sign of bullishness in Southeast Asian air travel.
FORBES: Cambodia Tycoon To Launch New Airline With Philippine Flag Carrier