库存品已经变质，而且全都搞混了，因此经理决定快刀斩乱麻，把它们当作废品出售，然后重新储藏新的物资。 The old stock had deteriorated and was all mixed up so the manager decided to cut the Gordian knot, sell it all as scrap, and re-stock with new materials.
变性特定的组织、细胞或器官随着受伤、疾病或年老而导致的相应的功能的削弱或丧失，而形成的逐渐的变质 Gradual deterioration of specific tissues, cells, or organs with corresponding impairment or loss of function, caused by injury, disease, or aging.
皮革受潮可变质。 Leather can deteriorate in damp conditions.