請問planet和comet的英文解釋是什麼呢

comet: [ 'k?mit ] n. 慧星詞形變化: 形容詞:cometary 例句與用法:

1. Comets move around the sun like planets, but in long oval course. 彗星象行星一樣繞太陽運轉，然而其軌道呈狹長的橢圓形。

2. A comet is at perihelion when it is closest (=very close) to the sun. 彗星最接近太陽時，它就是在近日點。

3. If I had binoculars, I could see that comet clearly. 如果我有望遠鏡，我就可以清楚地看見那顆彗星。

4. Their memory wasn't very good when it came to recalling other things, but they remembered the comet.