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- That comet is invisible to the unaided eye. 那颗彗星只用肉眼是看不到的。
- A comet is at perihelion when it is closest (=very close) to the sun. 彗星最接近太阳时，它就是在近日点。
- If I had binoculars, I could see that comet clearly. 如果我有望远镜，我就可以清楚地看见那颗彗星。
- The comet's ice, heated by the sun, rapidly and spectacular sublimate to gas. 彗星上的冰块在太阳热的作用下迅速而壮观地升华成气体。
- The central portion of the head of a comet. 彗核彗星头部的中心部分
- Why else might the comet have come undone? 是什么导致了慧星的灭亡?
- The rotation in the elliptic is retrograde. 在椭圆内的运动属于逆进型。
- Halley's comet calls on the earth every 76 years. 哈雷彗星每76年造访地球一次。
- The comet passed by in the twinkling of an eye. 俯仰之间，流星闪过。
- The Earth's path round the sun is elliptic. 地球绕太阳的轨迹是椭圆的。
- Halley's comet visits the Earth once in 76 years. 哈雷彗星每七十六年经过地球一次。
- In that way, Pluto acts like a comet. 也就是说，冥王星的行为像一个彗星。
- Nutlet is Brown, long elliptic, have 3 edge. 小坚果褐色,长椭圆形,具3棱。
- Some people feel that this light was a comet. 一些人认为这种光是一种慧星。
- The dialogue is elliptic and full of dark hints. 这次谈话很简单，充满了模糊的暗示。
- Sepals 5, petaloid, white, elliptic. 萼片5，瓣状，白色，椭圆形。
- I can hardly wait to see the new comet. 我急不可待地要见到新彗星的出现。
- Anthers elliptic, ca. 0.5 mm.Gynostemium 6-lobed. 花药椭圆形，约0.;5毫米。
- The comet will appear in the southern sky. 彗星出现在南方的天空。
- Leaf blade usually ovate to elliptic, or obovate. 叶片通常卵形的到椭圆形，或倒卵形。
