staircase用法

and all seven of my sisters and brothers we line up on the staircase and our brand new christmas pjs and have our picture taken and all seven of my sisters and brothers we line up on the staircase and our brand new christmas pjs and have our picture taken well over the sweater under sweater little front door back door little secret staircase well over the sweater under sweater little front door back door little secret staircase staircase staircase 名词，楼梯，应由指中小学和大学建筑物中的楼梯间复述。 staircases access staircase access staircase moving staircase moving staircase he groped his way up the staircase in the dark he groped his way up the staircase in the dark she was sitting on the bottom step of the staircase she was sitting on the bottom step of the staircase。