translation.en: Sometimes, when people visit a data center, they'll take a cell-cam photo and post it, and they aren't supposed to, but you can learn things about their hardware that way.
translation.zh: 有时当人们去访问数据中心 他们会用手机拍照 然后贴出来 虽然他们不该这么做 但是你可以由此了解硬件情况