The cometary ejection play a crucial role in formation and evolution of the meteoroid stream.

This cometary debris – bits of ice – create a meteor shower.

这些彗星的残骸——少量的冰——形成了流星雨.

So the cometary dust work had to take priority.

也因此彗星尘埃的工作获得了优先.

We need to study more comets.

我们需要研究更多的首星.

Comets are usually made of ice and rock.

彗星通常是由岩石和冰构成的.

Early Studies were connected with the origin of short-period comets.

早期的研究是为了探讨短周期彗星的起源.

These small objects, including asteroids, Kuiper Belt objects, comets and interstellar dust.

这些小天体包括小行星 、 柯伊伯带的天体 、 彗星和星际尘埃.

Any school kid can tell you that comets are made of ice.

随便找个小学生都会告诉你,彗星是由冰组成的.

Scientists want to learn how comets come into being.

科学家们想了解彗星是怎么形成的.

Perhaps, extinctions are caused by something outside, like comets and asteroids.

也许, 灭绝是由外来物体引起的, 比如彗星和小行星.

In addition, there are thousands of small bodies as asteroids and comets.

此外, 被发现的还有成千上万的小型天体像是小行星和彗星.

There are about 800 comets whose orbits are known.

人类已经知道有运行轨道的彗星大约有800颗.

They were stars, I knew, and flaring comets, that peopled my flight among the suns.

我知道是这些星辰和闪烁的慧星遍布在我飞行恒星之间的航程中.

The night sky is occasionally host to the transient visitors known as comets and meteors.

夜空有时还接待如彗星和流星那样的过路来访者.

We can see comets only when they come close to the earth.

只有当彗星接近地球时,我们才能看得见它们.

Most stars probably have their quota of planets, meteorids, comets, and asteroids.

多数恒星也许还拥有若干行星 、 流星 、 彗星和小行星.

As comets go, it is a whopper.

就彗星而言，它可是个庞然大物。

The central character is a bad man who shoots people and gets his comeuppance.

主要人物是一个持枪杀人的坏蛋，最终恶贯满盈。

Well done old bean , another blighter gets his comeuppance , well done.

干的漂亮, 又一个家伙得到了报应, 实在是漂亮.

He got his comeuppance when the bully thrashed him.

他被混混修理是罪有应得.

The tyrant President got his comeuppance when his country was invaded and conquered.

当他的国家被攻克时,那位暴虐的总统得到了他应得的惩罚.