Its applicability might be questioned on the grounds that carbonaceous shale is not known to occur near any of these deposits.

 
  • 其實(shí)用性是有疑問(wèn)的,因為還不知道在上述礦床附近存在著(zhù)碳質(zhì)片巖。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan