名词
中文翻译：低水平空气
同义词：
['sub-level air', 'low-level atmosphere']
例句：
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1.The scientists believe that the low level air pollution is a major cause of respiratory diseases.
科学家们认为低水平空气污染是导致呼吸系统疾病的主要原因。
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2.The city has implemented strict regulations to reduce the levels of low level air pollutants in the environment.
该市已实施严格的规定，以减少环境中的低水平空气污染物。
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3. The low level air quality has improved significantly since the implementation of these measures.
自这些措施实施以来，低水平空气质量已显著改善。