１９世纪中叶现代足球刚诞生的时候，场上 的２２名球员赶鸭子似的追着球满场跑，像狩猎一样乱哄哄的。后来随着新的科学技术渗入足球领域，球员们开始意识到球永远比人跑得快，组织一支进可攻、退可守的球队显得至关重要。人们开始考虑通过安排队员的场上位置和职责分工，达到 Just as the modern football of the mid-19th century was born, 22 players on the pitch hurriedly chased ducks like ducks and ran wild like hunting. Later, as new science and technology infiltrated into the field of football, players began to realize that the ball will always run faster than a man. It is crucial to organize a team that can attack, defend and defend. People began to think of ways to achieve this by arranging team members’ field positions and division of responsibilities