1·It hurts when I bend my knee.
我的膝盖一弯就疼。
—— 《牛津词典》
2·Bend the front knee, keeping the back leg straight, press the right heel down on the floor.
前腿膝关节弯曲，后腿保持绷直状态，右脚后跟贴紧地面并向下压。
3·Bend your knees and lower your back knee towards the floor, keeping the front heel down and the knee directly over the centre of the foot.
弯曲你的膝盖以及你的后腿膝盖向地面方向弯曲，保持前脚踝触地，以及膝盖在脚中心的正上方。
4·Bend the supporting knee during these transitions.
在这些体式变换时弯曲支撑腿的膝盖。
5·Bend the right knee and place the sole into the inside of the supporting leg.
屈右膝，脚掌抵在支撑腿内侧。
6·You might hear a crunching or clicking sound when you bend or extend your knee.
当你弯曲或伸展膝盖的时候可以听见卡吧喀吧的响声。
7·We bend the knee to no one human, any more than we bend to the abstraction of an ideal.
我们不对着任何人类屈膝，我们只对抽象的理想下跪。
8·As you begin to bend forward, the spine moves while the pelvis and sacrum tend to remain behind, especially on the side with the knee drawn back.
当你上体前屈时，脊椎向前移动，但骨盆和骶骨却要保持在原处，特别是屈膝的一侧。
9·On the inhale bend your left knee as you bring your arms forward and raise them overhead, fingers interlocked, palms facing up, and upper back arched slightly.
吸气时曲左膝，同时双臂向前高举过头，交叉十指，掌心向上，上背部微微拱起。
10·As your foot strikes the ground, your knee should be slightly flexed so that it can bend naturally on impact.
当脚接触地面时，您的膝关节应该略微弯曲，一旦受力的冲击，可以自然地进一步弯曲。