词汇	auxiliary stairs
释义	auxiliary stairs 便梯
随便看	principal order principal order module principal ordinance Principal Ordnance Mechanical Engineer Principal Ordnance Officer principal organ principal orientation principal orientation direction principal orthogonal system principal oscillation Principal oscillation pattern principal outer membrane protein principal outstanding Principal outstanding at face value principal parallel principal parameter principal parameters Principal Parametric Resonance principal part principal part and format principal part condition principal part function principal participation principal particular principal particulars