The quadriceps straightens the back knee.
股四头肌使后腿膝盖伸直。
Keep your front shin vertical, back knee straight, back heel lifted, and chest lifted.
保持前面小腿垂直地板，后膝伸直，后脚跟离地，胸腔上展。
Don't allow back knee to touch the ground and keep hip, knee and ankle aligned facing forwards.
后膝不应接触地面，并保持髋关节，膝盖和脚踝正面朝前对齐。
The key to hitting good half-volleys (shots you pick up at mid-court) is bending your back knee.
打好截击球(在网地中间拦击到的球)的关键在于弯曲后膝。
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。
Surgeon Geoffrey Horne placed a metal band around the knee cap to help it knit back together.
外科医生杰弗里·霍恩在膝盖骨上放了一个金属箍以帮助其愈合。
Standing with feet shoulder-width apart and cradle baby with both arms. Keeping a straight back and repeat deep knee bends.
双脚分开与肩同宽，双臂抱着婴儿。保持背部挺直，重复深膝弯曲。
Stand side-on to a bench with your closest hand and knee on the bench, back parallel to the floor (neck in line) and a dumbbell in your other hand, arm hanging straight down.
侧立于练习凳一侧，靠凳一侧的手与膝支撑于凳。背部与地面平行(与颈部成一条直线)，另一侧手手持哑铃，手臂垂直悬于体侧。
The report was particularly cricital of an officer who placed his leg and knee across Al-Ani's back, very close to his neck, for a prolonged period of time.
报告特别批评了其中的一位警察，当时他把腿和膝盖横过阿尔安尼的背部，离他的颈部非常近，并这样持续了很长一段时间。
Wearing high heels can cause long-term foot problems, such as blisters, corns and calluses, and also serious foot, knee and back pain and damaged joints.
穿高跟鞋可引发长期的足部疾病，比如水泡，鸡眼，老茧，以及严重的脚部、膝部和背部疼痛和关节损伤。
However, the panel suggested the FDA only approve Cymbalta as an additional treatment for lower back pain, and not osteoarthritis of the knee.
尽管如此，该委员会建议FDA仅仅批准该药物用于腰疼的辅助治疗，而不能治疗膝盖关节炎。
Happy couples are pleased to be seen together and are often in some kind of affectionate contact - hand on hand or hand on shoulder or knee or back of neck.
幸福夫妻总是很乐意被看到在一起，也经常会有亲密的小举动——手挽手，手搭在肩上、膝盖上或者是脖子上。
For example, knee injuries sometimes occur because running strengthens the back of your legs more than the front of your legs.
比如说膝盖损伤是因为跑步加强的后退的锻炼而忽略了前腿。
Your guy lies on his back, one leg outstretched and the other bent, knee pointing upward.
让你的男伴躺下，一条腿伸向一旁，另一条腿弯曲，膝盖朝上。
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。
Michael Ballack will be missing for the Germans in that friendly fixture on Wednesday in Gelsenkirchen after suffering inflammation to the back of a knee.
同时，巴拉克将因为膝盖发炎缺席德国队周三在盖尔森基兴的友谊赛。
Tot squats (hamstrings) : Standing with feet shoulder-width apart cradle baby with both arms. Keeping a straight back repeat deep knee bends.
幼儿蹲坐(腿腱)：两手放在婴儿车上，然后双脚与肩同宽，保持背部挺立，然后重复弯曲膝盖。
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。
With one knee resting on the floor, tighten your core muscles - including the muscles in your abdomen, back and pelvis - and lift the object between your legs.
单膝着地，收紧你的核心肌肉——包括腹部、背部和骨盆的肌肉，然后在两腿之间抬起物品。
Barefoot walking ensures proper alignment of the knee joint, hip joint and lower back.
光脚走路能够保证我们的膝关节、髋关节和下背部得到有效的调节。
As she spoke, I had continued to knee, my eyes on the pictures and notes, fighting back tears.
在她说话时，我继续跪着，我的眼睛盯着那些照片和便条，抑制着眼泪。
Wayne Rooney's new strike partner took his time to get into the match and there were moments in the first half when the ball would bounce back off his knee and his passing could be erratic.
鲁尼的锋线新搭档在这场比赛中充分展示了自己的能力，即使上半场有时球蹦蹦跳跳到他的膝盖时，他的传球会很诡异。
Lilly is seeking FDA approval for Cymbalta as a treatment for chronic pain conditions such as knee pain caused by osteoarthritis and lower back pain.
礼来公司正在向FDA申请将欣百达适应症扩展到慢性疼痛，例如因关节炎导致的膝盖疼痛和腰疼。
Straight leg Raises - Lie on your back with one leg straight and one knee bent.
伸直抬腿——平躺，一条腿伸直，另一条腿膝盖弯曲。
But Nadal obviously feels healthy enough to give it go, but mentally the knee has to be in the back of his mind.
纳达尔明显感到身体没问题，可以出战，可在心理上，伤痛的阴影总也挥之不去。
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。
Finally, one of the men turned his back on the maintenance van, went down on one knee, and pointed an unfamiliar object at the sky.
终于，一个人转身背对维修车，单膝跪下，把一件奇形怪状的东西指向天空。
Pitchford points out several form faults: "You want to keep your back straight and not allow the knee to drift forward ahead of the stance leg.
Pitchford指出许多种错误动作： “你应该保持背部挺直，膝盖不应该向前超过支撑腿。
If your skirt has a slit it should be small, centered in the back, and no higher than the back of your knee.
如果你的裙子有条开口，那必须是很小的，并在背后居中的，而且长度不能高于你的膝盖。
If your skirt has a slit it should be small, centered in the back, and no higher than the back of your knee.
如果你的裙子有条开口，那必须是很小的，并在背后居中的，而且长度不能高于你的膝盖。
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