Old material isn't it ? Which year ? ? It looks like something long time ago.
Sorry, just want to be sure it is not from "very very old material" !
Can you give exact date and year ?
Pay attention:
This article said Dr. Yan made a report personally there.....
How can he do it ?
He is not in China ?????
?????
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[此贴子已经被作者于2002-10-20 13:52:37编辑过]