أرسل هذا في رسالة قصيرة: Seasonal variation and sources estimation of PM2.5bound pahs from the ambient air of Chiang Mai City: An all-year-round study in 2017

 _    _      ___                _____     ____    
| |  | ||   / _ \\    ____     |  ___||  |  _ \\  
| |/\| ||  | / \ ||  |    \\   | ||__    | |_| || 
|  /\  ||  | \_/ ||  | [] ||   | ||__    | .  //  
|_// \_||   \___//   |  __//   |_____||  |_|\_\\  
`-`   `-`   `---`    |_|`-`    `-----`   `-` --`  
                     `-`