He stepped back, and stepped right on the lady's foot behind him.
他往后退了一步，正好一脚踩在一位站在他后面的太太的脚上。
The men stepped forward with their left foot; the women stepped back with their right.
男士左脚上前一步，女士右脚后退一步；
At times pain radiates down the back of the right lower extremity to the foot.
有时疼痛放射到右下肢后侧，一直到脚部。
At times pain radiates down the back of the right lower extremity to the foot.
有时疼痛放射到右下肢后侧，一直到脚部。
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