The Air Force used the shuttle for secret missions.

空军使用航天飞机进行秘密任务。

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Chen had admitted that he submitted falsified expense forms while in office but said the money was used for "secret missions" and not for personal benefit.

陈曾承认，他在任期间曾伪造过报销单据，但他表示，这些钱是用于“秘密任务”，而非用于个人利益。

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As the Apprentice grew stronger in the ways of the Force, Vader began testing him by sending him on secret missions to dispatch the Dark Lord's rivals and enemies.

随着秘密学徒在原力之道上越来越强，维德开始考验他，派他去执行一些秘密任务，消灭这位黑暗尊主的对手和敌人。

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Released earlier this week, Call of Duty: Black Ops takes players on secret missions abroad during the height of the Cold War.

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Called Enhanced Standards of Conduct, the new guidelines given to all Secret Service personnel make clear that standards of behavior required in the United States apply on missions abroad, the sources said.

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