asteroid; minor planet; planetoid

1. 小惑星最大的小行星之一，第二個被發(fā)現(xiàn)
   One of the largest asteroids, the second to be discovered.
2. 伊卡魯斯一個具有離心軌道的小行星，它在離太陽三千萬公里（一千九百萬英里）的范圍內(nèi)接近太陽
   An asteroid with an eccentric orbit approaching within30 million kilometers(19 million miles) of the sun.
3. 流星體活動在空間的固體天體，比小行星小，至少與塵埃一樣大
   A solid body, moving in space, that is smaller than an asteroid and at least as large as a speck of dust.

小的英語翻譯：

行星的英語翻譯：