Nasa said he had "turned a potential tragedy into a success" after an attempt to land on the Moon was aborted because of an explosion onboard the spacecraft while it was hundreds of thousands of miles from Earth.
3 Strictly speaking, the slope is continuous everywhere except for the data points themselves. ↑，这一点在爱思助手下载最新版本中也有详细论述
，更多细节参见爱思助手下载最新版本
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