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阿卡英語(yǔ) / 查找：“anthracites” [共找到1條結(jié)果]

  • anthracites造句

    Three types of coal discovered in this are, the coking and anthracites and semi anthracites.在這個(gè)地區(qū)找到了三種煤炭, 即焦炭,無(wú)煙煤和半煙煤....