Also visible at image upper left is Ellington Field.This airport services a variety of NASA aircraft used for astronaut training, scientific, and cargo transport purposes.

图中上方偏左处还能看到埃林顿地，那里被用作多种用于宇航员训练、科研和货物转运的太空署飞行器的机场。

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Also visible at image upper left is Ellington Field. This airport services a variety of NASA aircraft used for astronaut training, scientific, and cargo transport purposes.

图中上方偏左处还能看到埃林顿地，那里被用作多种用于宇航员训练、科研和货物转运的太空署飞行器的机场。

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Operator. The public air transport enterprise engaged in transport of passenger, baggage, cargo and mail by civil aircraft for profits, including domestic operator and foreign operator.

“经营人”是指以营利为目的使用民用航空器从事旅客、行李、货物、邮件运输的公共航空运输企业，包括国内经营人和外国经营人。

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Air freight offers speed for the 40% of the world's trade (by value) that travels in cargo flights or in the hold of passenger aircraft, but it costs ten times more than sea transport.

ECONOMIST: Fast container ships