名词
中文翻译：水平
同义词：
['grade', 'rank', 'tier']
例句：
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1. The student's level of English fluency is improving rapidly.
学生的英语流利程度正在迅速提高。
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2. The company's product line has been expanded to include new levels of quality.
公司的产品线已经扩展到新的质量层次。
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3. The team's performance level has been consistently high throughout the season.
整个赛季，该团队的表现水平一直很高。