noun🔗Share나트론, 천연 탄산나트륨Native sodium carbonate; natron."The ancient Egyptians used niter, gathered from dry lake beds, to help preserve mummies. "고대 이집트인들은 마른 호수 바닥에서 채취한 나트론을 사용하여 미라를 보존하는 데 도움을 주었다.chemistrymineralsubstancegeologyChat with AIVocabulary GamePractice Reading
noun🔗Share초석A mineral form of potassium nitrate (saltpetre) used in making gunpowder."The old chemistry book described how niter, found in certain caves, was a key ingredient in making gunpowder for cannons. "오래된 화학 책은 특정 동굴에서 발견되는 초석이 대포용 화약을 만드는 데 핵심 성분이었다고 설명했다.mineralsubstancechemistrygeologyweaponmaterialChat with AIVocabulary GamePractice Reading
