墙上突出而外端无支撑的阶梯的英文

hanging step

• 墙上:    on the wall
• 突出:    protruding; projec ...
• 端:    end; extremity
• 无:    not have; there is ...
• 支撑:    prop up; sustain; ...
• 的:    4次方是 The fourth po ...
• 阶梯:    a flight of stairs ...