translation.en: If the law enforcement is trying to find a murderer, or they're trying to catch a drug lord or trying to prevent a school shooting, and they have leads and they have suspects, then it's perfectly fine for them to tap the suspect's phone, and to intercept his Internet communications.
translation.zh: 比如如果执法机关正在寻找一名谋杀犯 或者搜捕一个贩毒者 或者试图阻止一场校园枪击案的发生 并且他们中有头目有嫌疑犯 此时如果能监听他们的手机 截获他们的网络通信那就太棒了