By 2020, the air force will have just two types of fast jet-fighter and strike versions of the Eurofighter Typhoon and the JSF.

到2020年，空军将拥有仅仅两种快速喷气式战斗机以及名为台风的欧洲战斗机和联合攻击战斗机。

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Dynamic Fuels has been making jet fuel for testing by the Air Force Research Laboratory.

“动力燃料”公司一直在生产航空燃料，提供“空军研究实验室”进行试验。

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The jet was flying at an altitude of 35, 000 feet and a speed of 521 MPH, the air force said.

飞机的飞行高度在35000英尺，时速是每小时521英里，空军报道说。

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Finally, our Royal Air Force jet was ready to take us to our destination.

BBC: Newsbeat - Afghanistan diary: Day One

Secretary of State Colin Powell said that both the White House and the presidential jet, Air Force One, had been targeted in the attacks.

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Most famous of these, of course is Air Force One, the official jet transport -- though actually there are two Air Force Ones, both modified Boeing 747-400s -- of the President of the United States of America.

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