Sit in a chair with your back up.

把腰挺直。

You have to keep your head very still？

您是不是还得挺直脑袋？

Dilcey was tall and bore herself erectly.

身材高大迪尔茜的腰背挺直。

Tops of the thighs are drawing down here as I lift up through the heart.

大腿尽量贴向地面，身体挺直。

Keep your back straight and don't move around too much.

保持背部挺直，不要常常四处移动。

An old man with a very straight back sat at the Star Table.

一位腰板挺直的老者在星际会议桌旁。

And if I straighten up my back, I can even get more.

如我挺直背，我甚至可以更高。

'Cause I always made sure I had a straight back.

因为我总是要确保我的背有挺直。

When doing this exercise, it's very important to keep your back straight.

做这个练习时，保持背部挺直非常重要。

Your back and hips must be stiff.

背部和臀部必须挺直。

Chimpanzees have a straight stiff spine, which supports climbing.

黑猩猩的脊椎挺直而坚硬，适于支撑攀爬。

Madame Maxime had drawn herself up to her full, and considerable, height.

马克西挺直她魁梧高大的身躯。

He got to his feet and stretched.

他从秋千上下来站到地上，挺直身体。

As soon as Nancy heard it, she sat up in her chair.

南希一听见这声音，立刻在椅子上挺直了身子。

Crouch as low as possible, keeping your back straight.

蹲得越低越，保持背部挺直。

You always have that huge moment of anxiety, but her spine's aligned.

你总是有焦虑的时候，但她的脊柱是挺直的。

It's best to have your spine reasonably straight, which may help prevent an involuntary nap.

脊柱保持挺直，这有助于防止不自觉的睡着。

But there, squaring her shoulders, lifting her chin, she shrugged her helpers off.

刚一站定，她就挺直脊背，抬高下巴，谢绝了旁的搀扶。

We can only do our best. Move with the breath. Slowly rolling it up.

我们只能尽力而为。随着呼吸移动。慢慢地挺直身体。

Keep your knees straight and touch the ground with your ears! called Charlotte.

“膝盖挺直，把你的耳朵碰到地面！”夏洛叫道。