Re
美 [reɪ]英 [reɪ]
- n.宗教教育(全写为 religious education,学校里讲授不同宗教知识的课程)
- 网络再;重新;雷诺数(Reynoldsnumber)

Re
1.(用于商业信函等开头介绍主题或回复电子邮件)关于,事由used at the beginning of a business letter, etc. to introduce the subject that it is about; used on an email that you are sending as a reply
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