English主要词典
planet
Universal Words
noun
1 [C] a large round object in space that moves around a star (such as the sun) and receives light from it:
the planets of our solar system * the planet Earth / Venus / Mars
2 (the planet) [sing.] used to mean 'the world', especially when talking about the environment:
the battle to save the planet
IDIOMS
to be on another planet
