何为劣化现象？deteriorate的词源？

劣化（deterioration）是指高分子物质性能降低不能复原的变化。高分子物质受热、光、紫外线、氧、臭氧及各种化学药品作用，会发生变色、龟裂、强度降低等物理或化学性能变化。

这些外部条件能引起高分子主链断裂或交联，导致结构变化且性能降低。判断劣化程度多用力学或电性能等各种物理性能变化作为尺度。

派生词是deterioration，中文意思是n. 恶化

The steady deterioration of the very climate of this very planet is becoming a war of the first order, and by any measure, the U.S. is losing.

1.Deterioration in the quality of new music.

2.Insights into the features of plenty of music.