| 释义 |
火星1huǒxīng太阳系九大行星之一,按离太阳由近而远的次序计为第四颗,比地球小,公转周期约687天,自转周期约24小时37分。{Mars; one of the nine planets in the Solar system, the 4th closest to the sun, smaller than the earth. It takes the Mars 687 days to revolve around the sun and 24 hours and 37 minutes to complete one rotation on its own axis.} |