In case of emergency at a place with no local mobile phone network coverage but roaming service is available, you may then call for assistance using the roaming service.是什么意思_In case of emergency at a place with no local mobile phone network coverage but roaming service is available, you may then call for assistance using the roaming service.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句