古时候,在欧洲大陆上,军队和军队相遇时就有靠右行的规定。因为当时军人都是左手持盾牌,右手持矛或剑。靠右行,双方可在对方持盾牌一边走过,避免右边的矛或剑误伤人。后来,此规定转 In ancient times, on the European continent, there was a right-hand rule when the army met the army. Because the soldiers were holding shields on their left hand and spear or sword on their right hand. On the right, both parties can walk by each other's shield while avoiding the spear or sword on the right. Later, this rule turn