burglar可数吗

　　例句：

　　The burglar alarm should be professionally installed.

　　防盗警报应当由专业人员安装。

　　He opened the door and came face-to-face with a burglar.

　　他打开门和窃贼打了个照面。

　　The main thing to remember is to switch off the burglar alarm.

　　最要紧的是记住关掉防盗报警器的开关。