air travel

基本解释

Air travel itself carries only very minimal risks of infection with TB of any kind.
航空旅行本身衹具有極小的感染任何類型結核的風險。
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來帶來更多的長隊、讓人無法容忍的延誤和加劇的汙染。
They are a good way to cut air travel and carbon emissions, particularly where, as in China, they connect dense but distant population clusters.
高鉄是減少航空旅行和碳排放的好途逕，尤其在象中國這樣的地方，它們連接了人口密集但偏遠的地區。

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.
如果你制造一個絕對光滑無摩擦的表麪,然後在上麪放個冰球或者別的什麽,或者氣墊,然後推它一下,在理想條件下,它會永遠運動下去
耶魯公開課 - 基礎物理課程節選
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