[00:00.00]Lesson 14 Comets
[00:02.60]彗星
[00:05.20]In recent scientific investigation of comets has increased
[00:14.16]because of a growing interest in the origin of the sun and planets.
[00:17.63]近年来，由于对太阳和行星的起源兴趣浓厚，人们对彗星进行了更广泛的科学调查。
[00:21.11]Scientists want to learn how comets come into being.
[00:24.44]科学家们想了解彗星是怎么形成的。
[00:27.77]They think that such information will help to explain the origin of the solar system.
[00:31.93]他们认为这方面的研究有助于解释太阳系的成因。
[00:36.10]The word"comet"comes from Greek and it means a 'hairy object'.
[00:39.93]彗星一词来源于希腊语，意为“长发的物体”。
[00:43.76]In history comets have a special place.
[00:46.43]彗星在历史上占有特殊的地位。
[00:49.11]People believed that they brought news of death,
[00:54.67]destruction,or military victories.
[00:57.20]人们认为彗星预示着死亡毁灭或胜利凯旋。
[00:59.72]The tails of comets provide viewers with spectacular sights at night.
[01:03.49]彗星的尾巴在夜空中堪称奇观。
[01:07.27]Comet tails are millions of kilometers long.
[01:10.20]彗尾的长度可达数百万公里。
[01:13.14]There is a written record of a comet as early as 1770 B.C.
[01:17.68]早在公元前1770年就有关于彗星的文字记载。
[01:22.21]The Chinese kept careful records and so did the Babylonians.
[01:25.63]中国人和巴比伦人对彗星做了详细的纪录。
[01:29.05]Aristotle was interested in comets.
[01:31.48]亚里士多德对彗星很感兴趣，
[01:33.91]He thought that they began as burning gases in the earth's atmosphere.
[01:37.54]他认为彗星最初是地球大气中燃烧的气体。
[01:41.17]The most famous comet in history is called Halley's comet.
[01:44.71]历史上最著名的彗星叫作哈雷彗星，
[01:48.25]Which appears every 75.5 years.It was named for Edmond Halley.
[01:57.39]an English scientist.
[01:59.28]他成功预测了他去世后16年，即1758年哈雷彗星的出现。
[02:01.16]He predicted the appearance of the comet in 1758,
[02:08.10]sixteen years after his death.
[02:10.29]他成功预测了他去世后16年，即1758年哈雷彗星的出现。
[02:12.47]Halley's comet is extremely bright and has two tails.
[02:18.95]Its latest return was in 1986.
[02:21.92]璀璨明亮的哈雷彗星有两条彗尾，最近一次回归是在1986年。
[02:24.90]A Second Solar System
[02:28.28]第二个太阳系
[02:31.67]Scientists have found a second solar system in the universe.
[02:34.61]科学家在宇宙中发现了第二个太阳系。
[02:37.54]What's the second solar system?
[02:39.67]什么是第二个太阳系？
[02:41.80]It's just a system like ours-
[02:45.64]with a star and a number of planets going around it.
[02:48.37]就跟我们的太阳系一样，有一个恒星和围着恒星转的几颗行星。
[02:51.10]Is this good news or bad news?
[02:53.64]这是好事还是坏事？
[02:56.17]It's exciting news!
[02:57.89]这是激动人心的消息。
[02:59.62]If we find a second solar system,we might find a second earth!
[03:03.25]如果我们能发现第二个太阳系，兴许就能发现第二个地球。
[03:06.88]You mean with people on it?
[03:09.11]你是说上面有人住的？
[03:11.35]Yes!Isn't that exciting?
[03:13.72]对啊。这难道还不让人激动吗？
[03:16.10]A Second Solar System
[03:21.84]第二个太阳系
[03:27.57]Scientists have found a second solar system in the universe.
[03:30.85]科学家在宇宙中发现了第二个太阳系。
[03:34.13]What's the second solar system?
[03:36.31]什么是第二个太阳系？
[03:38.49]It's just a system like ours-
[03:42.43]with a star and a number of planets going around it.
[03:45.16]就跟我们的太阳系一样，有一个恒星和围着恒星转的几颗行星。
[03:47.89]Is this good news or bad news?
[03:50.39]这是好事还是坏事？
[03:52.88]It's exciting news!
[03:54.50]这是激动人心的消息。
[03:56.12]If we find a second solar system,we might find a second earth!
[03:59.75]如果我们能发现第二个太阳系，兴许就能发现第二个地球。
[04:03.38]You mean with people on it?
[04:05.60]你是说上面有人住的？
[04:07.82]Yes!Isn't that exciting?
[04:18.90]对啊。这难道还不让人激动吗？ |