أرسل هذا في رسالة قصيرة: EXPERIMENTAL STUDY ON NONLINEAR OPTICAL PROPERTIES OF METAL CLUSTERS SERIES

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