30%的人认为可以改善空气质量的翻译：30% thought that can improve air quality 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

30% of people think we can improve air quality

30% thought that can improve air quality

30% person thought may improve the air quality

30 per cent of the people who think they can improve the quality of the air

30% thought that can improve air quality