發送短信 : Influence of surfactants on the force between two bubbles

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