發送短信 : Time-mean structure of secondary flows in open channel with longitudinal bedforms

 _____      _____      _____     ___      _  __  
|  __ \\   |  ___||   / ___//   / _ \\   | |/ // 
| |  \ ||  | ||__     \___ \\  | / \ ||  | ' //  
| |__/ ||  | ||__     /    //  | \_/ ||  | . \\  
|_____//   |_____||  /____//    \___//   |_|\_\\ 
 -----`    `-----`  `-----`     `---`    `-` --`