ประโยคภาษาจีน : 中文句子 |
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guò qù 过去 yǐ zhī 已知 zài 在 É méi shān 峨眉山 xuán wǔ yán 玄武岩 dǐng bù 顶部 qì kǒng 气孔 zhuàng 状 róng yán 熔岩 zhōng 中 hán yǒu 含有 xìng rén 杏仁 zhuàng 状 zì rán tóng 自然铜 dàn 但 hěn shǎo 很少 gòu chéng 构成 lián xù 连续 de 的 tóng kuàng 铜矿 tǐ 体 |
Although the amygdaloidal native copper aggregate was known in vesiculate lava at the top of the Emeishan basalts, economic copper ore deposits had not been discovered until two years ago. |