adj. chalky ; cretaceous
似白垩的 chalklike
白垩质的 cemental ; chalky
未加工的白垩 Chalk ; unprocessed chalk
白垩纪的 cretaceous
可用酸降解的白垩泥浆 acid degradable chalk mud
上最长的白垩礁带 chalk reef
白垩纪的化石 cretaceous fossils
奇特的白垩纪侵蚀景观 Erosionslandschaft der Kreidezeit
1724年，约翰·海因里希·舒尔茨发现银和白垩的混合物见光后会变黑。
The first permanent photograph was made in 1826 by Joseph Nicéphore Niépce, building on a discovery by Johann Heinrich Schultz (1724): a silver and chalk mixture darkens under exposure to light.
它由古罗马人一手炮制。罗马人命令所有被征服的民众要嘛购买白垩的心形糖果，在糖果上包裹轻浮的拉丁习语，要嘛接受严厉的惩罚。
It was cooked up by the ancient Romans, who ordered all of the empire's conquered peoples to buy chalky heart-shaped candies covered with flirty Latin phrases or face the punishment of crucifixion.
围绕索米尔的含白垩土壤出产著名的安茹葡萄酒。
The chalky soil around Saumur produces the famous Anjou wines.
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