托福听力黄金段子之理科段子：天文学

得听力者得托福，很多考生因为托福听力能力的薄弱使得整个托福考试的成绩都很差。对于托福听力的备考也有很多的方法，今天这里小编就为大家带来了托福听力黄金段子：天文学，希望对大家的托福备考有帮助。下面就跟小编一起来学习下吧。

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托福听力黄金段子：天文学

In ancient times, many people believed the earth was a flat disc. Well over 2,000 years ago; the ancient Greek philosophers were able to put forward two good arguments proving that it was not. Direct observations of heavenly bodies were the basis of both these arguments. First, the Greeks knew that during eclipses of the moon the earth was between the sun and the moon, and they saw that during these eclipses, the earth's shadow on the moon was always round, they realized that this could be true only if the earth was spherical, It the earth was a flat disc, then its shadow during eclipses would not be a prefect circle; it would be stretched out into a long ellipse. The second argument was based on what the Greeks saw during their travels. They noticed that the North Star, or Polaris, appeared lower in the sky when they traveled south, in the more northerly regions, the North Star appeared to them to be much higher in the sky. By the way, it was also from this difference in the apparent position of the North Star that the Greeks first calculated the approximate distance around the circumference of the earth, a figure recorded in ancient documents says 400.000 stadium, that's the plural of the world stadium. Today, it's not known exactly what length one stadium represents, but let's say it was about 200 meters, the length of many athletic stadiums. This would make the Greek's estimate about twice the figure accepted today, a very good estimate for those writing so long before even the first telescope was invented.

以上就是小编为大家带来的托福听力黄金段子：天文学，大家在托福备考的过程当中积累一些这样的段子，对于你的托福听力成绩提升会很有帮助。最后，小编预祝大家托福考试能取得理想的成绩。