In his book Cosmos, the late scientist Carl Sagan talks about the way in which the earth is regularly struck by material from outer space.

已故科学家卡尔·萨根在著作《宇宙》中叙述了外太空物体如何有规律和地球发生碰撞。

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Confucius Homely Talks is a valuable material for studying Confucius and early Confucianism, but the long-standing skepticism as to the authorship of this book has checked its study.

《孔子家语》是研究孔子与早期儒学的宝贵材料，但由于长期以来该书“伪书”说的影响，人们对其价值仍然心存疑虑。

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As for the things and phenomena in this material world, he just talks as they are, and objectively observes and learns about them, never mix his own opinions.

物质世界之内的现象、事物，他只就事论事，客观地观察、了解，但是不掺杂自己的意见。

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Mr Annan used the CHD in Kenya because it has no political agenda, so could be relied upon not to leak material in order to influence the talks one way or another.

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New "Car Talks" will be assembled from archival material, the brothers wrote.

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See, everybody talks about how wonderful the convention speech was, but I tell people, I had good material to work with -- (laughter) -- good material.

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