Here is Dr. Kripa Varanasi from the mechanical engineering department at M.I.T. explaining it: They're levitating on their vapor layer with the vapor cushion that's forming because the liquid is evaporating.

以下是麻省理工学院机械工程系的克里帕·瓦拉纳西博士的解释: 水在蒸发时会形成隔热的蒸汽层，水珠悬浮在蒸汽层上。