以下这一点应该会对你有所帮助:英国特种空勤团是由英国国家安全局(MI5,又称军情五处)和英国陆军情报六局(MI6,又称军情六处)共同训练以承担反间谍任务。
It may help you to know that the SAS is also trained by MI5 and MI6 security and intelligence services to undertake counter-espionage operations .