出单双出现规律的公式简介：Opening the safety of his rifle, Lu Tao carefully poked his head out, and sure enough he saw a small group of Japs, more than twenty of them, forming a fighting formation, trotting and shouting as they ran over.
Opening the safety of his rifle, Lu Tao carefully poked his head out, and sure enough he saw a small group of Japs, more than twenty of them, forming a fighting formation, trotting and shouting as they ran over.
