發送短信 : Phase transition accompanied by transformation of an elusive discrete cyclic water heptamer to a bicyclic (H2O)7 cluster

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