Task: Translation
Input (English): Sources suggest that Google may firstly introduce its telephony service to users in the United Kingdom, but the actual date when the service will launch and the exact details of the plan are as yet unknown.
Output (Chinese): 消息来源显示，“谷歌”可能首先为英国用户推出这一电话服务。但是提供该项服务的具体日期和详细计划尚不明确。