Their social and behavioural problems increase or decline with deterioration or improvement in parenting. Degenerative failures are those caused by the slow deterioration of performance over time. In recent decades, China has suffered from severe environmental deterioration and pollution. Therefore, many remaining objects are in danger of oxidation and eventual rapid deterioration. Oxidative stress is known to cause food deterioration and several diseases. Chronic exposure may lead to frequent bronchial infections and a general deterioration of health. To prevent buildup of the deterioration products, stabilizers are added. The patient cleared the virus and had no further neurological deterioration. They are a worn grayish brown which now suffers noticeable deterioration and weathering. The uncertainty this created among counterparties contributed to the deterioration of credit conditions. The beam is reduced with the funnels missing presumably due to deterioration. Stability is the ability of an explosive to be stored without deterioration. Progressive deterioration of physiologic function eventually outstrips acclimatization. Most initially have mild cognitive deterioration and clumsiness, as well as changes in behavior. Constriction can consequently lead to vocal deterioration.