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。

He had a broken arm and had shrapnel in his back and neck.

他手臂骨折，部和颈部有弹片。

Compensatory sweating of the back, abdomen, thighs and legs, possible gustatory sweating.

补偿性的部，腹部，大腿，脚部出汗，也许是味觉的发汗。

They are interesting for the fact that they are very plain and undecorated for the time, with only one plain central panel at the back and no armrests.

有趣的是它们都很朴素，没有任何装饰，部中央只有一个简单的板子，没有扶手。

And then the male was a tighter belly and a dorsal rope on the top.

鱼的腹部，部有一根线。

“Yeah, you've got to stay, mate, ” said Ron, thumping Harry on the back.

“是啊，你一定得留下来，哥们，”罗恩说，拍打着哈利的部。

Our back skins are thicker, with small pores.

部肌肤则厚、孔洞小。

And we lift up from the pelvic floor and we reach the right hand to the small of the back or the sacrum, and we open up through the chest.

我们从骨盆底抬起，右手伸到部或骶骨，然后打开胸腔。

Let me help you with that. I don't want you to hurt your back.

让我来帮你。我不想你伤到你的部。

I can just imagine a scene with a typist sitting on an old-fashioned typing chair, her back aching, exhausted, then we show her in one of your chairs. Her back properly supported filling full of energy, typing twice as quickly.

我直接就能想象出这样一个场景：一位打字员坐在一张老式的椅子上，她腰酸痛，神情疲倦，这时我们把公司其中一种椅子展示在她面前，坐上去之后她的部得到了很好的支撑，全身充满了能量，打字的度是之前的两倍。

Back fat, I see you popping over my bra today, but that's alright.

部的脂肪，我看到你今天出现在我的胸罩里， 但是没问题。

A pat on the back is one way to demonstrate power.

轻敲部是显示权力的一种方式。

They've experienced back pain and weakened muscles after missions.

他们在执行任务后发现自己患上部疼痛和肌肉衰弱。

If you give me a " pat on the back" -okay?

如果你给我一个“轻拍部”-懂了吗？

The pain is mostly in my lower back.

疼痛主要在下部。

Many astronauts have complained of eye and back problems after coming back down to Earth and its gravity, and now scientists say they've discovered some new risks with long term space flight.

许多宇航员在返回地球重力环境后反应了眼睛和部出现的问题，现在科学家们说他们发现了一些长期太空飞行的新风险。

I was having some trouble with my back, but I'm much better now.

我部有点毛病，不过现在好多了。

They might trace their hands up your back or down your arms.

他们可能会把手伸到你的部或手臂上。

However, if you tilt your head forward at a 45-degree angle, the weight your back has to handle increases to 45 pounds.

然而，如果你的头部以45度角向前倾斜，那么部必须承受的重量将增加到45磅。

There was a big argument. Somebody stabbed me in my back.

我们发生了很大的争执。然后有人用刀捅了我的部。