词汇	master switcher
释义	master switcher 校准用转换开关
随便看	system of plates system of play system of point-groups system of point sets system of polar coordinates system of policies and regulations system of policy decision system of political consultation system of political democracy system of political parties system of polynomials system of pooling of capital expenditure System of pouring system of power and responsibility system of power transmission System of Practical Courses system of practical teaching system of practical units system of practice education system of practice teaching system of practice teaching professional system of practicum system of prefectures and counties system of prefectures and principalities system of preventing from water-draining