關於「When to use CC」標籤，搜尋引擎有相關的訊息討論：

Email Etiquette – When should you use BCC and CC? - LinkedInwww.linkedin.com › pulse › email-etiquette-when-should-...Email etiquette 101: Using Bcc vs. Cc - B12 websitewww.b12.io › resource-center › content-creation › email-e...What's the Difference Between CC and BCC When Sen