Keep your leg straight. Keep your leg straight for me.

腿伸直 给我腿伸直。

Other bone and joint features include scoliosis where the spine has a sideways curve, an inability to extend the elbows all the way to 180 degrees, flexible joints, a downward slant to the eyes, and a narrow palate that crowds the teeth.

其他骨关节特征包括脊柱侧弯（脊柱向一侧弯曲呈弧，无法伸直肘部至180°）、关节活动增加、眼睛下斜、颚部狭窄、牙齿拥挤排列不齐。

So, the blade faces up, perfect, so you're holding with your thumb, your index is out, wrap and twist, and then, keeping the prongs down, they go into your mouth.

刀刃朝上，完美，用你的拇指住，食指伸直，住，翻转，保持叉子朝下，然后入口。

Front legs stretched out, back ones tucked in to flip the other half of its body around.

前腿伸直，后腿缩成一团，将身体的另一半翻转过来。

Lie on your back on a flat surface, keeping your legs straight.

仰面平躺，双腿伸直。

He held his neck straight and stiff, waiting for the crash.

他脖子伸直，绷得的，等着听那些哗啦声。

They had gone one day and one night with their elbows on a chalk line on the table and their forearms straight up and their hands gripped tight.

整整一天一夜，他们手儿搁在桌面一道粉笔上，胳膊朝上伸直，两只手着。

The boy was on his back with his feet to the car.

男孩倒在地上 双脚伸直。

Puck is arching her back and then stretching it out.

帕克弯了一下后背，然后往前伸直。

Finally, with a laugh, he said that some of these western towns were very dangerous; and after this declaration he straightened his legs under the table, nodded his head, and laughed again, loudly.

最后，他笑着说，西部城镇中有一些地方非常危险。说完这句话，他在桌子下面腿伸直，点了点头，又放声大笑起来。

And that's actually really important. If you put your hand out the window of a car and you put it straight it just pushes straight backwards.

这真的很重要。如果你你的手伸出车窗，然后你它伸直，它就会你的手向后推。

Think like the bicep curl where you want to start at the very bottom, elbows straight and at full extension, and then lift all the way to the top, elbow bent and at full flexion.

想象一下二头肌弯曲的样子，从最下面开始，肘部伸直是完全伸展，然后一直抬起，肘部弯曲就是完全弯曲。

But there's a downside to the resurgence of traditional swaddling, where the arms are restrained and the legs are stretched out: fears that it will fuel developmental hip problems in babies, known to be linked to the technique.

但传统襁褓的回潮存在缺陷——婴儿的胳膊被捆住不能动，而腿是一直伸直的——人们害怕这会引发婴儿髋部发展问题，而众所周知这与包裹技术相关。

They conclude that Lucy could straighten her knee joints, enabling her to stand and walk upright as we do and thereby inhabit grasslands, but also that her big, powerful leg muscles helped her live in trees like modern apes.

他们得出的结论是，露西可以伸直她的膝关节，使她能够像我们一样站立和直立行走，从而生活在草原上，而且她巨大而有力的腿部肌肉可以帮助她像现代猿类一样生活在树上。

Bernard stood watching the retreating twinkle of the white stockings, the sunburnt knees vivaciously bending and unbending again, again, and the softer rolling of those well-fitted corduroy shorts beneath the bottle green jacket.

伯纳站着，望着离去的白袜的闪光；望着她那晒黑的膝盖矫健地伸直，弯曲，再伸直，再弯曲；望着玻瓶绿的短外衣下那里身的灯心绒短裤。

Its long, slender legs were stuck out at odd angles where it had fallen and its mane was spread pearly - white on the dark leaves.

它修长的腿保持着它摔倒时的姿势，很不自然地伸直着；它的鬃毛铺在漆黑的落叶上，自得像珍珠一样。

All the proofs arose before her at once; her heart leapt. The flame of the fire threw a joyous light upon the ceiling; she turned on her back, stretching out her arms.

所有的证据同时都摆在面前，她的心怦怦跳了。 壁炉里的火焰在天花板上投下了一片红光，欢欢喜喜，哆哆嗦嗦；她转过身去，伸直了胳膊。

Finally, both the ulnar and median nerves innervate the lumbricals, which are 4 muscles that extend the fingers at the interphalangeal joints, and keep them flexed at the metacarpal phalangeal joints.

最后，尺神经和正中神经都支配蚓状肌，这四条蚓状肌能使指间关节的手指伸直，同时掌指关节保持屈曲位。

He just put out his hand, his thumb, index finger, and pinkie extended, the other two fingers curled in toward his palm.

他只是探出手，拇指、食指和小指伸直，另外两根手指向掌心弯曲。

That included a limousine ride to the airport and a seat on which he could stretch out during the flight.

其中包括乘坐豪华轿车到机场，以及在飞行中可以伸直身体的座位。