| 释义 |
水星shuǐxīng太阳系九大行星之一,按离太阳由近而远的次序计为第一颗,绕太阳公转周期约88天,自转周期约58.6天。{Mercury; one of the nine major planets in the solar system, and the first in distance from the sun, having a period of revolution of 88 days and a period of axial rotation of about 58.6 days} |