quality decline

• 质量下降

quality decline的用法和样例：

例句

1. The quality of performance has fallen off since last year.
   去年以来，演出质量下降了。
2. Lipid oxidation is a major cause of quality deterioration in food emulsions.
   摘要脂质氧化是造成食品乳状液质量下降的一个主要原因。