单词	ladder approach
释义	ladder approach 阶梯式教法
随便看	middle frequency middle frequency band network middle frequency coefficients Middle frequency DBD middle frequency deafness middle frequency furnace middle frequency high voltage source middle-frequency induction furnace Middle-frequency magnetron sputtering Middle-frequency power supply middle frequency quench control middle frequency reactive sputtering middle frequency source middle frequency transformer middle frontal gyrus middle frontal sulcus middle fuel station middle fuselage middlegame middle game middlegames middle game stage middle Gansu province middle gasket middle gastro-epiploic vein