名词
中文翻译：改进
同义词：
['enhancement', 'enhancement', 'amelioration']
例句：
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1. The company's product quality hasbeen continuously improving over the past year.
该公司的产品质量在过去一年内持续提高。
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2. The teacher's teaching methods have greatly improved ourlearning efficiency.
老师的教学方法大大提高了我们的学习效率。
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3. The economy is expected to improve inthe coming years.
预计未来几年经济将有所改善。