块状、通常颜色暗淡且不透明的石英岩、角岩、不纯玉髓等燧石状矿物。
块状、通常颜色暗淡且不透明的石英岩、角岩、不纯玉髓等燧石状矿物。；燧石；[化] 燧石
块状、通常颜色暗淡且不透明的石英岩、角岩、不纯玉髓等燧石状矿物。
Massive, usually dull-colored and opaque, quartzite, hornstone, impure chalcedony, or other flint-like mineral.
燧石制成的燧石状工具。
A flint-like tool made from chert.
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