主行星 meaning in Chinese
primary planet
principal planet
Examples
- Not only is it unusally large ( 40 percent more massive than pluto ) , but it orbits neptune backward , the only large moon to orbit in the opposite direction of its host planet ' s spin
它不仅有非同一般的大小(比冥王星还大40 % ) ,而且它还绕着海王星向后运转,是唯一一颗运转轨道方向与主行星相反的大卫星