Then he sits down, slowly, puts his crutches on the floor, undoes the clasps on his legs, tucks one foot back and extends the other foot forward.

然后，他缓慢地坐下，把拐杖放到地上，把他腿上的矫正器卸下，把一只脚向内弯曲，另一只脚向前伸。

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That puts great force on the back of the foot.

VOA: special.2010.02.03

Then he would fall down on the floor again like a ball of dirt and start rubbing the side of his head with his back foot as if he had no idea he had been doing any more than any frog might do.

VOA: special.2009.08.29

and Mexican officials. Every day, thousands of people on foot and in vehicles go back and forth across the border here, and millions of dollars worth of products cross the line in trucks and railroad cars.

VOA: standard.2009.04.30

"It was hard to even imagine setting foot back into the building where such a tragedy occurred, " she told classmates gathered in the square.

NPR: Ohio Students Commemorate Classmates Slain By Teen

Then Billy's friend set up a television under his desk, mounted at an angle so if Billy was sitting just a foot back in his chair, he could look down and see the picture.

NPR: Excerpt: 'Then We Came to the End'

But Care's charged-down kick immediately put them on the back foot again, Cipriani scrambling back to avert a potential Australian try after Nathan Sharpe's punt ahead to the line.

BBC: England 14-28 Australia