The StringBuilder class in the System.Text namespace joins strings together without allocating a new string instance each time; this efficiency greatly improves memory utilization.

Text 命名空间中的 StringBuilder 类无须每次分配新的字符串实例即可将字符串连接在一起；这一效率大大改进了内存的利用。

youdao

Certainly, this efficiency can be improved by increasing the coupling layer when the bandwidth is reduced at the same time.

当然，这个效率能随着耦合层的增加而提高，但这是以牺牲带宽作为代价的。

youdao

youdao

In principle, this value, this efficiency, can approach 1 as the low temperature approaches absolute zero.

这个值，效率，当低温热源的温度1,是据对零度时可以达到一。

麻省理工公开课 - 热力学与动力学课程节选

So that means we can rewrite this efficiency.

这意味着我们可以重写出效率。

麻省理工公开课 - 热力学与动力学课程节选

OK. So to do this, we need a little more abstract way of talking about efficiency, and so, the question is, how do we think about efficiency? Typically there's two things we want to measure.

好，为了达到这个目的,我们需要用一种有点，抽象的方式去讨论效率，这衍生出来,一个问题，我们该怎么去认识效率？,主要来说我们有两个要量化的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

This efficiency undoubtedly reduces the potential amount of time customers have to think about their purchases before they reach the register.

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And while this efficiency-oriented competition thrives on getting in your face at every possible moment, the quality of our lives is also driven out.

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California was able to achieve this efficiency by establishing building codes that require energy efficiency in new construction, and by stimulating private companies to improve the efficiency of their own operations.

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