名词
中文翻译：拥挤等级
同义词：
['congestion', 'crowding']
例句：
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1.The train was so crowded that it felt like we were all crammed into a small space.
火车非常拥挤，感觉我们都挤在一个小空间里。
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2. The city is experiencing a congestion of traffic due to the holiday weekend.
由于假日周末，这个城市正经历交通拥堵。
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3. The company has decided to increase the congestion level in the office area.
公司决定提高办公室区域的拥挤程度。