Everyone talks about the "five" senses of human beings. It is true that we get our information about the outside world from our sense of sight, hearing, smell, touch and taste. Researchers tell us that the sense of sight--our visual sense--gives us up to 80% of what we know about the world outside bodies, while the senses, the auditory (hearing), the olfactory (smell), the tactile (touch), and the gustatory (taste) bring into our brains information about the other twenty percent of what is happening. But there are two other senses that we cannot get along without, though they are seldom noticed. There are the sense of balance, without which we would act like a drunk after a heavy drink, and the kinesthetic (动觉的) sense, which gives us our ideas about our own motion.
One will behave like a drunken man if one has no sense of ______ .