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decline , decay , degeneration
improvement
concern about the rapid deterioration in relations between the two countries.
对两国关系迅速恶化的担忧。
the slow steady deterioration of a patient with Alzheimer's disease.
阿尔兹海默病患者病情的持续缓慢恶化。
雅思英语词汇收录8785个雅思英语词条，基本涵盖了全部常用雅思英语词汇的翻译及释义，是英语学习的有利工具。