例句：
The burglar alarm should be professionally installed.
防盜警報應(yīng)當(dāng)由專業(yè)人員安裝。
He opened the door and came face-to-face with a burglar.
他打開門和竊賊打了個照面。
The main thing to remember is to switch off the burglar alarm.
最要緊的是記住關(guān)掉防盜報警器的開關(guān)。