在过去，外部安全气囊用于帮助无人苍着陆，包括火星探路者的着陆。
External airbags have been used in the past to help unmanned space landers, including Mars Pathfinder, touch down.
火星表面显示出广泛的地质特征，包括巨大的火山——太阳系中已知的最大的火山——和广阔的撞击坑。
The surface of Mars shows a wide range of geologic features, including huge volcanoes—the largest known in the solar system—and extensive impact cratering.
天文馆从太空中收集了70块石头，包括来自月球、火星等地方的石头。
The planetarium has collected 70 stones from the space including those from the moon, Mars and so on.
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