https://blog.wongcw.com/2022/02/12/google%e6%8a%98%e6%88%9f%ef%bc%9a%e8%b0%b7%e6%ad%8c%e9%80%a3%e7%ba%8c%e5%85%a9%e6%ac%a1%e6%ae%ba%e6%ad%bb%e4%ba%86currents/
Google+折戟:谷歌連續兩次殺死了Currents