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词语彗星拆分为汉字：
彗字的拼音、笔画、偏旁部首、笔顺、繁体字，彗字字源来历，彗字演变
扫帚：～星（俗称“扫帚星”）。……
星字的拼音、笔画、偏旁部首、笔顺、繁体字，星字字源来历，星字演变
天文学上指宇宙间能发光的或反射光的天体；一般指夜间天空中发光的天体：～球。恒～。行（xíng ）～。卫～。披～戴月。细碎的小颗粒东西：火～儿。秤等衡器上记数的点：定盘～。军官衣领上的徽记：五～将军。形容夜间：～行。～奔。星名，二十八宿之一：……
汉语拼音：huì xīng
People might remember a few years ago, we had a fantastic comet, called Comet Hale-Bopp; suddenly came out of nowhere.
人们可能还记得几年前，我们发现一个壮观的彗星，也就是海尔-博普彗星，它的出现突然间让世人震惊。The comet was a type known to astronomers as a sun-grazing comet because its path brought it extremely close to the sun.
这个彗星属于天文学家所称的“掠日彗星”类型，因为它会顺着轨道极度靠近太阳。Because of its angle of approach, Lulin appeared to have a second anti-tail pointing toward the sun as it neared Earth.
由于靠近时的角度，鹿林彗星在逐渐接近地球时似乎拥有另一条指向太阳的反彗尾。Scientists are not certain where meteors come from, but many of them seem to be fragments of planets that crashed into one another.
科学家们还不能肯定，流星来自哪里，但是，许多流星似乎是行星相互碰撞而产生的碎片。其他流星是彗星尾巴的微小颗粒。So there might be more of them in the Kuiper Belt (where comets come from) as compared with the inner solar system near the sun.
所以或许相比于太阳系内部，它们在“柯伊伯带”（彗星形成之地）比较多。As you know, pulling particles from the interstellar side is vastly more difficult than it was for the cometary side.
要知道，从星际尘埃这面拉出楔块比从彗星尘埃那面要困难的多。The first human inhabitants of North America may not have exterminated the mammoths. The culprit might have been a comet.
北美洲最早的人类可能不是灭绝猛犸象的凶手。真正的罪犯有可能是一颗彗星。The slump is being discussed as if it were a natural catastrophe like the arrival of the comet that destroyed the dinosaurs.
人们谈论衰退，就好像在谈论自然灾难，犹如彗星撞击地球，使恐龙灭绝。But like the tail of every other comet, Halley's tail is just dust.
其实，哈雷的彗星与一般的彗星无异，都是由尘埃构成。