首先感谢程老、沈老和各位委员在百忙中参加前寒武纪地质研究中心和同位素地质年代学研究中心成立会议 ,并指导我们的工作。明天上午举行两个中心成立大会 ,今天我们在这里开预备会介绍情况 ,这次大会的内容是选举学术委员会正副主任 ,修改研究中心工作规则和学术委员会章程 , First of all, I would like to thank Cheng Lao, Shen Lao and all the members for their busy schedule to attend the Precambrian Geological Research Center and the Isotope Geochronology Research Center to set up a conference and guide our work. Tomorrow morning we will hold two center-setting conventions. Today we are going to hold a preparatory meeting to introduce the contents of the meeting. The contents of the meeting will be to elect the vice-director of the Academic Committee, modify the working rules of the Research Center and the statutes of the academic committees,