柯林斯詞典planet /?pl?n?t/ (planets) 1. N-COUNT A planet is a large, round object in space that moves around a star. The Earth is a planet. 行星 The picture shows six of the nine planets in the solar system. 這張圖片展示太陽系9個行星中的6個行星。 返回 planet劍橋詞典an extremely large , round mass of rock and metal , such as Earth , or of gas , such as Jupiter , that moves in a circular path around the sun or another star 行星 the planet Earth /Venus 地球／金星 Might there be intelligent life on other planets? 其他星球上有可能存在智能生命嗎？ 例句 The planet Jupiter radiates twice as much heat from inside as it receives from the Sun.an unmanned mission to the planet Mars They launched a rocket to the planet Venus .Environmentalists have no political axe to grind - they just want to save the planet.Is it too late to repair the damage we have done to our planet?習語be on another planet 返回 planet