所谓“脱毛”一词，是德国著名化学家李比希用来说明化学家必须适应化学的迅速发展时的一个形象比喻。他说，化学正在取得异常迅速的发展，这就要求希望赶上这种发展的化学家们不断处在脱毛过程中。不适于飞翔的旧羽毛不断从翅膀上脱落下来，而代之以新生的羽毛，这样飞起... The so-called “hair removal” is a figurative metaphor used by the famous German chemist, Li Bixi, to illustrate that chemists must adapt to the rapid development of chemistry. He said that chemistry is making exceptionally rapid growth, which requires that chemists who want to catch up with this development are constantly in the process of hair removal. The old feathers, which are not suitable for flying, keep falling off their wings and replacing them with the newborn feathers.