أرسل هذا في رسالة قصيرة: Source apportionment of polycyclic aromatic hydrocarbons in road dust in Tokyo

 _____       ___       _____   _    _     ______  
|  __ \\    / _ \\    / ___// | || | ||  /_   _// 
| |  \ ||  | / \ ||   \___ \\ | || | ||    | ||   
| |__/ ||  | \_/ ||   /    // | \\_/ ||   _| ||   
|_____//    \___//   /____//   \____//   /__//    
 -----`     `---`   `-----`     `---`    `--`