[ 复数 marls 第三人称单数 marls 现在分词 marling 过去式 marled 过去分词 marled ]
Before Tianwen l, no country had ever tried to send an orbiter, a lander and a rover in one single expedition to Mars.
在“天问一号”之前，没有国家尝试过在单次火星探测中发射轨道飞行器、着陆器和探测器。
Relative size of the inner planets of the solar system (from l-r) : Mercury, Venus, Earth, and Mars.
太阳系内部行星的相对体积(拍自1 - r)：水星、金星、地球和火星。
Relative size of the inner planets of the solar system (from l-r) : Mercury, Venus, Earth, and Mars. New research supports the idea that Mars owes its small size to its relatively rapid formation.
太阳系内部行星的相对体积(拍自1 - r)：水星、金星、地球和火星。
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