单词 | Mars |
释义 | Word Frequency Mars 1(mɑːz) noun the Roman god of war, the father of Romulus and Remus Greek counterpart: AresWord Frequency Mars 2(mɑːz) noun 1. Also called: the Red Planet the fourth planet from the sun, having a reddish-orange surface with numerous dark patches and two white polar caps. It has a thin atmosphere, mainly carbon dioxide, and low surface temperatures. Spacecraft encounters have revealed a history of volcanic activity and running surface water. The planet has two tiny satellites, Phobos and Deimos. Mean distance from sun: 228 million km; period of revolution around sun: 686.98 days; period of axial rotation: 24.6225 hours; diameter and mass: 53.2 and 10.7 per cent that of earth respectively 2. the alchemical name for iron |
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