标题: an english book [打印本页] 作者: wyj7506 时间: 2008-7-12 22:04 标题: an english book special English for chemical engineering作者: tom2005 时间: 2008-11-1 00:51
haha, hope you can bring some professional english data here and then it is avaible for us to improve professional english.
Thank you in advance