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在日常生活中，不知你注意到这种现象没有：一条干毛巾，当下部接触水的时候，毛巾的上部也会渐渐变湿。这就是说，水可以沿着毛巾的细孔自动地跑上来。这种现象叫做“毛细现象”或“毛细作用”。这是水的一种有趣的特性。你可能举一反三地说：油也有这种性质呀！不错。过去的
I do not know if you noticed this phenomenon in daily life: a dry towel, the upper part of the towel will gradually get wet when the lower part comes in contact with water. This means that water can run automatically along the pores of the towel. This phenomenon is called “capillary phenomenon” or “capillary action.” This is an interesting feature of water. You may tell the whole story: Oil also has this nature! Not bad Past