主句: Facebook(主语)+ is credited with(谓动,被动语态)+ sparking the change(介宾)时间状语从句: when it(主语)+ allowed (谓动)+outside programmers(宾语)+to develop new features for the wildly popular social networking site(宾补). 句意: 脸谱网(Facebook)这个红透半边天的社交网站允许外来程序设计师为其开发新功能, 因此众人称赞它为融发这项变革的火花。...