Shares in facebook, the world’s largest online social network have finally risen above the price which they were launched last year. _____________________________ Correspondents say investors have been encouraged by a surge in revenue from advertising on mobile devices. The US government has released declassified documents about its phone surveillance programme. Officials said they wanted to be more transparent about their intelligence gathering. However, a significant amount of information was blanked out of the documents which relate to the phone snooping activities revealed by the former National Security Agency contractor Edward Snowden.And that’s the BBC News 世界上最大的在线社交网络脸谱网的股价终于超过了去年的发行价。______________________________________通讯员表示，由于广告手机设备收益增加，投资者受到了鼓舞。 美国政府公布了关于电话监控项目的经过解密的文件。官员表示，他们希望在情报收集方面更加透明。然而，前国家安全机构承包商斯诺登泄漏的电话窃听方面的相关文件仍有大量空白。BBC世界新闻。
