水星大气及表面成分光谱仪（MASCS）：获取日照和背阳面大气成分剖面；在紫外波段对外溢层尾迹观测；
Mercury Atmospheric and Surface Composition Spectrometer (MASCS): Profiles of atmospheric composition on the day and night sides;
水星大气及表面成分光谱仪（MASCS）：获取日照和背阳面大气成分剖面；在紫外波段对外溢层尾迹观测；
Mercury Atmospheric and Surface Composition Spectrometer (MASCS): Profiles of atmospheric composition on the day and night sides;
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