An App Engine application can send and receive chat messages to and from any XMPP-compatible chat messaging service, such as Google Talk. An app can send and receive chat messages, send chat invites, request a user's chat presence and status, and provide a chat status.展开全文 原微博
[ios] Working with Protocols, Objective-C allows you to define protocols, which declare the methods expected to be used for a particular situation.展开全文 原微博
[Baidu Dict] Clash V-RECIP(体育用语中尤用来指热情高涨的比赛双方)交锋,交手,厮杀, The two sides will clash there only if Chelsea beat Sunderland in their quarter-final replay.展开全文 原微博
