What is left-handed?

Left-handers, also known as "left-handers", refer to people who are more accustomed to using their left hands, and "profit" refers to the hands they are accustomed to using. In daily life, left-handed people constantly encounter problems that need a lot of energy to solve. The experiences of left-handed children show great differences in painting, writing and reading. Its characteristics are: first, there are always unique views different from others in some aspects; Secondly, the ability of mathematics, visual perspective and space is good for the development of mathematics and architecture. The third left-hander seems to perform well in sports that require quick response and correct spatial judgment. It is judged by many hand movements, including pulling, throwing, twisting, holding, holding a pen, using a needle and so on. You must use your left hand.