NASA's Personal Satellite Assistant possesses none of these things; instead it USES small fans to propel itself through zero gravity.
NASA的个人卫星助理不需要这些，它依靠小型风扇在零重力环境中推进。
NASA's Personal Satellite Assistant possesses none of these things; instead it USES small fans to propel itself through zero gravity.
NASA的个人卫星助理不需要这些，它依靠小型风扇在零重力环境中推进。
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