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，但我们的足和背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。

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

他手臂骨折，背和颈有弹片。

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

补偿性的背，腹，大腿，脚出汗，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，背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.

鱼的腹较紧，背有一根线。

“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，拍打着哈利的背。

Our back skins are thicker, with small pores.

背肌肤则较厚、孔洞较小。

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，右手伸到背或骶骨，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。我不想你伤到你的背。

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，她腰酸背痛，神情疲倦，这时我们把公司其中一种椅子展示在她面前，坐上去之后她的背得到了很好的支撑，全身充满了能量，打字的速度是之前的两倍。

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

背的脂肪，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.

轻敲背是显示权的一种方式。

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

他们在执行任务后发现自己患上背疼痛和肌肉衰弱。

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

如果你给我一个“轻拍背”-懂了吗？

The pain is mostly in my lower back.

疼痛主要在下背。

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环境后反应了眼睛和背出现的问题，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.

我背有点毛病，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背或手臂上。

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，如果你的头以45度角向前倾斜，那么背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背。