Jackson, who works at NASA's Goddard Space Flight Center, also likes the idea that their research at Racetrack Playa has a dual purpose.

Jackson在NASA的戈达德航天飞行中心工作，他也认为在赛马场盐湖的研究具有双重意义。

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Dual or multi task model was recommended. The strategy of assessing flight ability from the cognitive psychological point of view was also dis-cussed.

介绍了双重或多重任务模型，并提出了以认知心理学观点评定飞行能力的设想。

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The delta-winged Columbia, before reaching the orbit, jettisoned its dual booster rockets two minutes into flight.

三角翼的哥伦比亚号航天飞机在进入轨道前，起飞两分钟就抛下其两个助推火箭。

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"Arianespace Flight 142 placed its dual satellite payload in a lower than desired orbit following a problem with the launcher's upper stage, " the statement said.

CNN: Ariane rocket puts satellites in defective orbit