Most schoolchildren learn about capillary action in science class. It ’ s a phenomenon where a liquid confined in a narrow space such as a thin tube rises spontaneously, acting against the force of gravity. This strange effect occurs because of inter-molecular attraction between the liquid and the surrounding solid surface.
學生時期，幾乎每個人都曾在自然課本中唸過「毛細現象」，所謂「毛細現象」，指的是液體在細管狀的物體內側，因其內聚力和附著力的差異，可克服地心引力而爬升擴散的現象。