高婵，李伟东，李俊松，丁霞，蔡宝昌【摘要】 目的考察自然铜炮制前后微量元素的含量变化，以探讨自然铜炮制机理。
Objective To investigate the changes of microelement in curde and calcined pyritum, and approach the process mechanism of pyritum.
阿里巴巴称，对支付宝的重组打算已经和以下四位董事会成员讨论了几年了，他们是：马云，阿里巴巴公司首席财务官蔡崇信，软银公司总裁孙正义以及雅虎创始人杨致远。
Alibaba said it had been discussing restructuring the Alipay unit for several years with the four board members: Mr. Ma; Alibaba's chief financial officer.
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