internal lag内部滞后internaladj.国内的；内部的；身内的internal iliac artery髂内动脉internal risk factors内部风险因素internal return ratio混合液回流比Internal radiotherapy内照射internal audit service内部审计处internal report system内部报告制度internal fired furnace内燃炉,内燃烧炉internal spiral sulcus内螺旋沟internally coated bulb内磨砂灯泡internal driving force内生动力