词汇	屁股着地的摔倒
释义	屁股着地的摔倒 pratfall
随便看	square ingot square ingot milling machine square inserted handle box wrench square in shape square integer square integrability squareintegrable square integrable square-integrable squareintegrable function square integrable function square-integrable function square integrable martingale square integrable representation square integrable unitary representation square-intergrable function square in the campus square in university square iron square iron bar square iron core coil square iron-core coil square iron-core deflection coil square it square jackscrew