Air freight costs 5 times more than transportation by trucks and 20 times more than by rail. But it is more reliable, punctual and predictable under normal operating condition.

航空运输的费用是公路运输的五倍，铁路运输的二十倍之多，但是它在通常情况下更加准时，可靠和可预见性。

youdao

For instance, air freight and ocean shipping costs have plunged by as much as two-thirds since last summer as demand has fallen.

举例来说，自去年夏季以来，因需求骤降，空运及远洋运输费用猛跌了三分之二。

youdao

To ensure rapid and stable freight transport, using the latest Korean Air cargo Boeing 747-400f, reduce fuel costs and by improving the quality of management to meet customer needs.

为保证货运运输的迅速和稳定，大韩航空采用最新货机波音747 - 400f，减少燃料费用，并通过完善的品质管理来满足客户的需求。

youdao

Additional costs of rushed orders and air freight were not unheard of.

FORBES: Microsoft Knits Windows Into India

Air shipping typically costs two to five times more than ocean freight, but prices are more reasonable for small devices like iPhones and iPods than, say, flat-screen TVs.

FORBES: How Apple Will Avoid The Holiday Gadget Crunch

However, heavier, less urgent and low value per pound shipments will increasingly shift towards the sea route as companies thrive to manage their total distribution costs efficiently, which would limit the growth in air freight segment.

FORBES: After Weak Results FedEx Looks Like A $105 Stock