I have the same content available on two domains. How do I tell Google
that the two domains are the same site?
我同時在兩個網域提供相同內容，如何讓 Google 知道這兩個網域是同一個網站？
Use a 301 redirect to direct traffic from the alternative domain (example2.org) to your
preferred domain (example.com). This tells Google to always look for your content in one
location, and is the best way to ensure that Google (and other search engines) can crawl
and index your site correctly. Ranking signals (such as PageRank or incoming links) will
be passed appropriately across 301 redirects. If you're changing domains, read about the
best practices for making the move.
您可以使用 301 重新導向，將替代網域 (example2.org) 的直接流量導向至偏好的網域 (example.com)。這樣一來，Google 就會一律在同個位置查看您的內容，這也是確保 Google (和其他搜尋引擎) 能正確檢索您網站並且建立索引的最佳做法。系統也會透過 301 重新導向正確傳遞排名信號 (例如 PageRank 或連入連結)。如果您打算變更網域，請參閱有關遷移作業的最佳做法。