留不住的是人心BYK
Interfacial Tension 界面张力Between a liquid and a solid there are adhesive forces, leading to spreading. The cohesive forces within the liquid are counteracting this and lead to retraction. 液固态之间有附着力，使其扩散，而液体内部的内 聚力与之相反，使其回缩Liquid 液体 adhesive force 附着力 cohesive forces 内聚力 Solid固体 adhesive force 附着力Spreading: work of adhesion > work of cohesion 扩散：附着力的功 > 内聚力的功
