noun🔗Share沥青玻璃，黑曜岩。 A natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma"The sharp edges of the pitchstone found near the volcano were used by early humans to make tools. "早期人类利用火山附近发现的**沥青玻璃（黑曜岩）**锋利的边缘制作工具。geologymaterialChat with AIVocabulary GamePractice Reading
