In their quest for water on our planet's satellite, researchers have had to rely on the analysis of lunar rocks that US Apollo space missions brought to Earth in the late 1960s and early 1970s.
在他们对于在我们这颗行星的卫星上是否有水的追求下，研究者们不得不依靠美国阿波罗太空任务带来将20世纪60年代末和70年代早期地球月球岩石带回地球进行分析。
Part of the reason the Apollo ships succeeded was that they had an exceedingly clear goal: to fly to the moon and strictly obey the laws of simplicity and safety on the way.
阿波罗号飞船成功的部分原因是有非常明确的目标：飞往月球，并在途中严格遵照简明及安全的法则。
NASA claimed that these spots were left by Apollo 15 when returning to Earth, and they are the evidences that U. S. astronauts had landed on the moon.
美国宇航局说，这些斑点是阿波罗15号返回地球时留下的，他们就是美国宇航员登上月球的确凿证据。
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