If the topic changes, change the subject line to match it.

如果邮件中所谈的主题变了，改变标题使其匹配。

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Zheng Shu, Large Intestinal Carcinoma Specialty Committee, Zhejiang Medical University, Topic: Changes from Basic to Clinical Research on Large Intestinal cancer-chances and Challenges.

郑树，大肠癌专业委员会-浙江医科大学，题目：大肠癌基础向临床转化研究的机遇与挑战。

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Facebook will enact a vote on changes to its governance when more than 7, 000 comments have been made by users on a topic.

BBC: Facebook offers control to users

Dinaburg said he became interested in this topic last year at Black Hat when a friend, Robert Edmonds, and Paul Vixie presented on a study of changes observed within the domain name system (DNS).

FORBES: Bitsquatting: Machine-Garbled Internet Connections