Quora - A place to share knowledge and better understand the world
Quora 是知识沉淀和积累非常高效的社会化问答网站，是知乎 Copy to China的原型。在Quora能看一些在知乎不能聊的话题,Quora站外社交营销，Quora是全球流量最大的问答网站。
Instagram社交媒体软件。Welcome back to Instagram. Sign in to check out what your friends, family & interests have been capturing & sharing around the world.
流量全球第4,类似国内的“天涯+贴吧 。Reddit is a network of communities based on peoples interests. Find communities youre interested in, and become part of an online community!
Pinterest照片墙。Discover recipes, home ideas, style inspiration and other ideas to try.