名词
中文翻译：水平
同义词：
['grade', 'rank', 'tier', 'stratum']
例句：
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1. The level of the river has dropped significantly.
河流的水位大幅下降。
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2. The company's performance level has improved over the past year.
公司的业绩水平在过去一年内有所提高。
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3. The new policy will affect all levels of society.
新政策将影响整个社会的各个层面。