Scientists say these unmanned flights can make important and exciting discoveries.
科学家们说这次无人

太空飞行能够获得令人兴奋
重大发现。
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Their unmanned privately funded spacecraft was supposed to make a soft controlled landing there but communication was lost when it was about 500 feet away from the moon's surface, and it was traveling toward it at 310 miles per hour.
他们
无人驾驶私人资助
宇宙飞船本应在那里进行软控着陆,但当它距离月球表
约500英尺时失去
联系,并以每小时310英里
速度飞向月球。