noun 下载 🔗分享 燧石，燧石类矿物。 Massive, usually dull-colored and opaque, quartzite, hornstone, impure chalcedony, or other flint-like mineral. Examples : "The arrowhead found in the field was made of a dark brown chert. " 在田里发现的箭头是用深棕色的燧石做的。 geology mineral material substance 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 燧石工具，燧石器。 A flint-like tool made from chert. Examples : "The archaeologist carefully brushed the dirt off the chert she found, recognizing it as a tool used by early humans. " 考古学家小心翼翼地刷去她发现的燧石工具上的泥土，认出它是早期人类使用的工具。 archaeology geology material 与AI对话词汇游戏阅读练习
