The benches are replaced by new ones very like the same our jackknives had defaced.

从前桌凳，都已置换，新的旧的，看来相差无几，我们口袋小刀，刻坏不少桌椅。

But Mike did repipe your entire second floor, didn't he?

但麦克将你家二楼的水管置换一新，对吗？

As these endlessly bumped and collided, they fractured or split or recombined in endless random permutations, but in every encounter there was a winner, and some of the winners grew big enough to dominate the orbit around which they traveled.

这些微行星无休止地碰撞，它们或破裂，或分解，或在无休止而又意的置换中重新合并，但每次碰撞都有一个赢家，有的赢家越来越大，最后主宰了它们运行的轨道。

Hip and shoulder joints use a ball-and-socket design that allow rotational movement, but the more flexible a joint is, the more unstable and fragile it is — which is one reason why you see so many dislocated shoulders and hip replacements.

髋关节和肩关节采用球窝设计，允许旋转运动，但是关节越灵活，它就越不稳定和脆弱——这也是为什么你会看到这么脱臼的肩膀和髋关节置换术的原因之一。

Some go back to the 1970s and one of the oldest keeps records of hip replacements, letting medics compare the long-term performance of procedures and implants.

一些病例可以追溯到1970年代，而记录最长的有一项是髋关节置换的病例，使医护人员比较常规治疗与植入治疗的长期表现。

When the rods can be handled fluently, they can be used to calculate the answer to many practical problems in building, agriculture, logistics, and warfare.

如果能熟练地使用这些算筹，它们就可以用来计算建筑、农业、粮食置换和战争的中许实际需求。

They trade poor people problems for rich people ones, loneliness problems for relationship ones, common people problems for famous people ones, and so on.

他们用穷人的问题置换富人的问题，他们用孤独的问题置换人际关系的问题，他们用普通人的问题置换名人的问题，诸如此类。

America even managed to reach the replacement rate of 2.1, meaning its population was sustaining itself, without taking migration into account.

美国甚至达到2.1的人口置换率，这意味，在不考虑移民的情况下，该国人口基本保持不变。

" CPI doesn't allow for immediate substitution, which exacerbates the divergence, " says Julie Smith of Lafayette College.

“CPI不会将即时的置换计算在内，这就会导致差距扩大，”拉斐特学院的朱莉·密斯说。

This meant that the displaced water measured his volume exactly.

这意味被置换的水准确地测量了他的体积。

The new letter ordering, what’s called a permutation, is the encrypted message.

新的字母排列顺序，也就是所谓的置换，就是加密后的消息。

They opened the vents and let fresh air displace the residual stimulant.

他们打开通风口， 让新鲜空气置换残留的兴奋剂。

Second, let's crank out those hip replacements.

其次，让我们加快髋关节置换手术的进度。

And also he basically trades a set of influences.

而且他基本上是在置换一组影响他的音乐元素。

Can model the severity of disease and predict the outcome of heart valve replacement surgery A digital twin of the whole heart will allow simulation of the treatment of a particular individual for many other conditions as well.

可以模拟疾病的严重程度，并预测心脏瓣膜置换手术的结果。整个心脏的数字孪生将允许模拟特定个体的许其他疾病的治疗方案。

Charlie's seminal work on replacement joints has retained its significance as factors such as an ageing population and rising obesity levels worldwide continue to increase the incidence of musculoskeletal conditions such as osteoarthritis.

查理关于关节置换的开创性工作仍然具有重要意义，因为全球人口老龄化和肥胖率上升等因素继续增加骨关节炎等肌肉骨骼疾病的发生率。

You might find out that it's possible to have a knee replacement surgery in another country, for example Mexico or India, where it costs a lot less money.

你可能会发现，在其他国家，比如墨西哥或印度，进行膝关节置换手术的费用要低得。

Now, because the cube is entirely in the fluid, the volume of the cube is the same as the  volume of the fluid displaced by the cube.

现在， 因为立方体完全在流体中，所以立方体的体积与被立方体置换的流体的体积相同。

The way to phrase this precisely is to say there's a one-to-one mapping between rotations of a cube and permutation of four elements which preserves composition.

精确表述这一点的方法是说，立方体的旋转与四个元素的置换之间存在一一对应关系，并且这种对应关系保持复合运算。

Sound-based vibration treatment has been shown to help people with pain from arthritis, menstrual pain, postoperative pain, knee replacement pain.

基于声音的振动治疗已被证明可以帮助患有关节炎、月经痛、术后疼痛、膝关节置换疼痛的人。