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他用脚踩住最底下的横档稳住梯子。
He put his foot on the bottom rung to keep the ladder steady.
《牛津词典》
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当梯子落在地上时，中间的横档会被描绘成什么形状?。
What shape does that middle rung trace out as the ladder falls to the floor?
youdao
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当梯子落在地上时，中间的横档会被描绘成什么形状?。
What shape does that middle rung trace out as the ladder falls to the floor?
youdao