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步兵原来是徒步作战的,用步枪和机枪之类近战武器攻击敌人,占领阵地。因此,步兵有战场上行动速度慢、不能抵御敌火力射
The infantry turned out to be on foot and attacked the enemy with melee weapons such as rifles and machine guns, occupying positions. As a result, infantry have slow movement on the battlefield and can not resist enemy firing