Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and cannot easily withstand repeated strain imposed by oversize limbs.

此外，尽管人类已经直立行走数百万年，但我们的足部和背部仍难以适应两足直立的姿态，无法轻松承受过大的肢体反复施加的压力。

You're already in the upright and locked position.

您已经蓄势待发了。

On the contrary, he sat bolt upright and broke into a sweat.

恰恰相反，他腾地从床上坐了起来，急出了一身冷汗。

Percy seized Ron and was dragging him back to the bank (" Gerroff, Percy, I'm all right! " ); Dumbledore and Bagman were pulling Harry upright; Fleur had broken free of Madame Maxime and was hugging her sister.

珀西抓住罗恩，把他拽到岸上（" 放开，珀西，我没事！" ）；邓布利多和巴格曼把哈利拉了起来；芙蓉挣脱了马克西姆夫人的阻拦，一把搂住了妹妹。

It's good to sit upright and look alert.

笔直的坐姿，有神的目光，这些都是正确的。

As he played he sat bolt upright, gaunt and aquiline, unsmiling in his crisp, perfect suit, with his elbows held close to his sides.

在演奏时他的背挺笔直，瘦削且轮廓分明，穿着一身干净体的西装而表情严肃，手肘紧靠在身体两侧。

Tall and rather thin but upright, the Director advanced into the room.

主任往屋里走去。他身材修长，略显瘦削，身板挺直。

There's no reason that thing should stay upright.

那个东西怎么可能立住。

Onna Odori, the female dance style, is distinguished by its upright stance and physical discipline and it's intended to an embodiment of feminine grace and beauty.

Onna Odori (女踊り), 是女性化的舞蹈风格，主要特点是步法非常正直，意在体现女性的优雅和美丽。

Cinder, who had been sleeping, suddenly sat upright and sniffed the air.

一直在睡觉的灯花忽然起身坐直，闻了闻空气。

The whole shack shivered and Harry sat bolt upright, staring at the door.

整个小屋摇摇晃晃，哈利坐了起来，盯着房门。

Harry sat bolt upright, his heart pounding, his bandage turban askew.

哈利腾地坐了起来，心嗵嗵地跳着，绷带歪到了一边。

It's an oversize claw on the second digit of each foot that was held upright when the Raptor was walking.

迅猛龙脚上最大的第二根脚趾在它们走路时会竖起来。

Well, like all gyms, they have all sorts of things to help build up muscles in different parts of the body, like upright bicycles, chest stretching machines, and running machines.

像所有的健身房一样，他们有各种各样的器械，帮助你身体各个部位来增强肌肉，像直立单车、胸部拉伸机和跑步机。

We've got little side guards to keep her body straight and upright.

我们有小的侧卫来保持她的身体直立。

When you're sitting down your posture should be upright.

当你坐下来时，姿势要端正。

To avoid having your groceries shift around your vehicle on your ride home, causing a mess, feed a bungee cord through the handles of each bag and keep them in their full and upright locked position.

在购完物回家的路上为了防止购买的杂物四处乱跑，混乱一片，请把每只塑料袋的把手内串一根橡皮筋装满每个袋子，让它们竖直向上锁定好位置就行啦。

Here on Earth where most of us live, we spend about a third of everyday lying down sleeping and two-thirds standing or sitting in an upright position.

在我们大多数人居住的地球上，我们每天大约有三分之一的时间躺在床上睡觉，三分之二的时间站立或坐着。

" Did you hear me? " Ron said weakly, though he was clinging painfully to Harry to stay upright.

“听到我的话了吗? ”罗恩有气无力地说，尽管他此时痛苦地抓住哈利才能站直。

At that time, our distant ancestors had just learned to walk upright.

那时，我们的远祖刚刚学会直立行走。