名词
中文翻译：Unknown
同义词：
['enhancement', 'enhancement', 'amelioration']
例句：
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1. The company's product quality has been significantly improved since the new manager took over.
自从新经理上任以来，公司的产品质量已经显著提高了。
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2. The teacher noticed that the students had made significant improvements in their English speaking skills.
老师注意到学生们在英语口语技能方面有了显著的提高。
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3. The project team has made substantial improvements to the design, resulting in a more user-friendly interface.
项目团队对设计进行了实质性的改进，使得界面更加用户友好。