| 释义 |
eight principal planets
基本例句
n.八大行星
用作名词The earth is one of the eight Planets.地球是八大行星之一。
Leading astronomers declared Thursday that Pluto is no longer a planet under historic new guidelines that downsize the solar system from nine planets to eight.要天文学家周四宣布，在发布历史性的新方针后，太阳系九大行星缩减为八大行星，冥王星已不再是行星。 |