The bent knee position means that the thighs are working continuously.

滑冰时的屈膝姿势意味着大腿在不停地运动。

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One of the best ways to start training the quads to work in the straight-knee position is by sitting on the floor with your legs stretched out straight in front of you.

训练运用股四头肌来伸直腿的最好的方法之一是腿伸直坐在地板上。

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After putting on my knee pads I assume the position to clear the yard of weeds, even in the rock garden.

穿上护膝后，我就承担起清除院子里，甚至在石头花园里的杂草的任务。

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However, they would and should have been behind in the 25th minute when Clinton Morrison got into a great position in the box, but somehow managed to knee the ball over the bar from a yard out.

BBC: Sport - Football - Sheffield Weds 4-1 Hereford