名词
中文翻译：水平
同义词：
['grade', 'rank', 'standard']
例句：
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1. The level of the water is too high for me to swim.
水的深度对我来说太高，我游不了。
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2. The company's performance has been on a downward trend for several years.
这家公司的业绩已经连续几年下滑了。
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3. The new manager has brought in a level of efficiency that we haven't seen before.
新经理带来了我们以前没有见过的效率水平。