ONE PHRASE, IN CONTEXT
是……背后的原因；支持；落后于
GET TO KNOW THE MEANING
IN A SENTENCE
A faulty sensor was behind the false alarm that emptied the building.导致大楼疏散的误报，是由一个故障传感器引起的。
A faulty sensor was behind the false alarm that emptied the building.
导致大楼疏散的误报，是由一个故障传感器引起的。
