發送短信 : Customer loyalty and the product life cycle.

 _    _      ___      ____     __   __    ______  
| |  | ||   / _ \\   |  _ \\   \ \\/ //  /_   _// 
| |/\| ||  / //\ \\  | |_| ||   \ ` //   `-| |,-  
|  /\  || |  ___  || | .  //     | ||      | ||   
|_// \_|| |_||  |_|| |_|\_\\     |_||      |_||   
`-`   `-` `-`   `-`  `-` --`     `-`'      `-`'