每日背誦第二期54
Today, we know exactly how rainbows are made. In the seventeenth century, the scientist Isaac Newton and the mathematician and philosopher Rene Descartes analyzed them very carefully. They concluded that rainbows were caused when sunlight was broken up as it passed through raindrops.
現(xiàn)在，我們已確切知道彩虹是怎樣形成的。在十七世紀(jì)，科學(xué)家牛頓和數(shù)學(xué)家兼哲學(xué)家的笛卡爾，就非常仔細(xì)地分析過(guò)彩虹，他們斷定-彩虹的形成是因?yàn)殛?yáng)光穿過(guò)雨滴時(shí)被打散所致。
(短文節(jié)選,本篇始于：彩虹來(lái)自何方)
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