空气质量有所提高
The air quality has improved
以上为机器翻译结果，长、整句建议使用 人工翻译 。
世界卫生组织警告说，随着空气质量恶化，很多疾病的风险也有所提高，其中包括中风、心脏疾病、肺癌以及哮喘等呼吸道疾病。
The WHO warns that as air quality worsens the risk increases for many diseases. These include stroke, heart disease, lung cancer, and breathing diseases such as asthma.
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