该建筑被宣布不适合人类居住。

The building was declared ___un___fit for human habitation.

汽车还会排放一氧化碳，使空气变得不适合呼吸。

Cars also emit carbon monoxide and make the air ___un___fit to breathe.

这块肉已经变质，不适合食用了。

This meat has gone bad and is ___un___fit for human consumption.