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The aim is to fly at about Mach 2, twice the speed of sound.
目标是以大约2马赫的速度飞行，也就是音速的两倍。
youdao
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Chang 'e 2 will fly to the moon directly in a 120-hour journey.
嫦娥二号“将经过120小时的旅程后直飞月球。”
youdao
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Chang 'e 2 will fly to the moon directly in a 120-hour journey.
嫦娥二号“将经过120小时的旅程后直飞月球。”
youdao