泰国曼谷 – 2018年6月21日，城市景观显示出尘埃、泰国空气污染，颗粒物直径小于或等于2. 5微米（PM2. 5），高于 免版税库存图片 泰国曼谷 – 2018年6月21日，城市景观显示出尘埃、泰国空气污染，颗粒物直径小于或等于2.5微米（PM2.5），高于
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