發送短信 : Description grammars: Precedents revisited

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