| 单词 | 黑曜岩 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔knap〕To break or chip (stone) with sharp blows, as in shaping flint or obsidian into tools.敲碎：用重击来撞碎或凿碎（石头），如把燧石或黑曜岩石制成工具美国传统〔obsidian〕A usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava.黑曜岩：火山玻璃，一般为黑色，带状，摔碎时色泽光亮，表面变曲，由火山熔岩迅速凝而成美国传统〔spherulite〕A small, usually spheroid body consisting of radiating crystals, found in obsidian and other glassy lava rocks.球粒：由放射状结晶构成的通常为球状的小粒，常见于黑曜岩及其他玻璃质的火山岩中美国传统 |
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