白垩 (bái è) — chalk (calcium carbonate, soft limestone)
뜻
白垩 (bái è) is a soft white limestone (calcium carbonate) — the geological term, not classroom chalk (which is 粉笔). Also names the Cretaceous period (白垩纪).
noun
chalk (calcium carbonate, soft limestone)
양사 · 种
예문
- 白垩。Zhè zhǒng bái è zhǔ yào yòng yú gōng yè hé jiàn zhù.This kind of chalk is mainly used in industry and construction.
- 。Kǒng lóng zài bái è jì fēi cháng fán shèng.Dinosaurs flourished in the Cretaceous period.
- 白垩。Kē xué jiā zài yán céng zhōng fā xiàn le dà liàng bái è.Scientists discovered a large amount of chalk in the rock layers.
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