Bend one knee up and keep the other extended.

弯曲一个膝盖，而让另一个膝盖伸展。

youdao

While nowhere near as common as knee or ankle sprains, torn ACLs put players out of the game for up to a year.

虽然不像膝盖或脚踝扭伤那么常见，但是前十字交叉韧带撕裂会让运动员停赛最长一年之久。

youdao

Slot your foot (big toe up, pinky toe down) into the crack up to the arch of your foot, keeping your knee out to the side.

把你的脚尖（大脚趾在上，小指在下）楔入裂缝中去，直到你的足弓的部分，膝盖保持向外。

youdao

The last time Tom Huddlestone played on artificial turf he was out for six weeks as his knee blew up like a balloon.

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Anyone who has played a pick-up basketball knows what it's like when the old guys in the short-shorts and knee braces show up at the gym they may not run up and down the court like 19-year-olds, but they're going to play defense, box everyone out, contest every layup, look for the right shot and make the whole court stink of liniment.

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After recovering from a knee injury picked up against Argentina in September, he takes his place in the second row alongside Victor Matfield.

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