人类的种属（英汉对照）

Classification is a kind of human cognitive abilities. We are prone to sort out everything we see, hear, Smell, taste and touch, such as classing willow, poplar, ginkgo and oak as trees; lotus, chrysanthemum, peony and wintersweet as flowers; monkey, zebra, tiger and snake as animals; piano, violin, trumpet and flute as instruments; hamburger, sandwich, cheese and bread as food. As there are hundreds of thousands of phenomena in the world and we humans are too limited in time, energy and wisdom to study them one by one, the most convenient and pragmatic way to explore the nature of everything and thereupon put them at the service of us is to research categories into which everything is arranged instead.