Definition: not good enough or not having the qualities needed or expected for something Level: B2
这栋建筑被宣布不适合人类居住。
The building was declared ___unfit for human habitation.
汽车也排放一氧化碳，使空气不适合呼吸。
Cars also emit carbon monoxide and make the air ___unfit to breathe.
他糟糕的健康状况使他不适合服兵役。
His poor health made him ___unfit for military service.
