發送短信 : Characteristic of bubble rise in quiescent or moving liquids

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