名词
中文翻译：水平
同义词：
['grade', 'rank', 'class']
例句：
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1. The road is level enough to drive on without a ramp.
这条路的坡度足够平缓，不需要斜坡就能开车。
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2. The level of the water in the lake has dropped significantly.
湖里的水水平显著下降。
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3. The engineers were leveling the bridge for safety reasons.
工程师为了安全原因正在平整桥梁。