The bargain is very pure; Employee puts in hours of physical or mental labor and employee draws out life-sustaining moola.

这种交易很纯粹；雇员投入数小时的体力或脑力劳动来得到维持生计的薪水。

Number 9, mental work doesn't tire your brain.

第 9 条，脑力劳动不会让大脑疲劳。

It's a noun, it means physical, or mental effort.

它是一个名词，意味着体力，或脑力劳动。

Imagine it-three days of continuous brainwork! And against the top players in the country, too.

想一下，连续三天的脑力劳动！并且和这个国家最优秀的棋手对阵。

Working with your hands contrasts with working with your head, like an office worker would.

动手操作与脑力劳动形成对比，就像办公室职员的工作那样。

On a similar note, a resilient person must embrace new challenges and the effort that comes with them, perhaps in the form of new exercises and mental tasks, or bigger milestones such as moving house and quitting smoking.

同样，一个有原力的人必须接受新的挑战和随之而来的努力，可能是新的锻炼和脑力劳动，或更大的里程碑，比如搬家和戒烟。

But if we replaced all the jobs that require human physical labor and then we replace all the jobs that require human mental labor, then you have to ask, What’s left?

但如果我们取代所有要人类体力及脑力劳动的工作，你会问了, 那还有什么剩下的?

Once you're doing work with machinery, indoors, doing double-entry bookkeeping and all that kind of head work, alcohol is the wrong drug, and caffeine is the right drug.

只要从事操作机器的，在室内的，做式记账工作的，以及所有脑力劳动，那酒精就是坏事的，咖啡因才是正确的选择。

The academics write that decision fatigue " typically involves a tendency to revert to the 'default' option, namely whatever choice involves relatively little mental effort" .

这两位学者写道，决策疲劳“通常涉及一种回归‘默认’选项的倾向，即要相对较少脑力劳动的选择”。

By comparison, caffeine's big contribution to human progress has been to intensify spotlight consciousness – the focused, linear, abstract and efficient cognitive processing more closely associated with mental work than play.

相比之下，咖啡因对人类进步的巨大贡献在于，它强化了聚光灯意识——这种专注、线性、抽象、高效的认知过程与脑力劳动的关系比娱乐更密切。

This is mental work, and a child who doesn't have a motive to speak a language- either a need or a strong desire- will often avoid it.

这是一种脑力劳动，而一个没有求或强烈愿望作为动力的孩子将会经常避免这种脑力劳动。

That summarizes the argument in the in the rest of the paragraph: First of all, most people work indoors and want to have a break from mental work.

首先，大多数人在室内工作，希望能从脑力劳动中得到休息。

It is, though, a totally different kind of mental effort from plugging lots of numbers into complicated square root formulas and ultimately, much more worthwhile.

不过，这是一种完全不同的脑力劳动，不要把大量的数字代入杂的平方根公式中但结果更加值得。

Working on the right things is what makes knowledge work effective. This is not capable of being measured by any of the yardsticks for manual work.

要做该做的事，这是脑力劳动显得有效的关键。要想用体力劳动的尺码来衡量脑力劳动是绝对行不通的。

I worked in one of my professors' gardens and enjoyed the contact with the soil as an alternative to my intellectual labors.

我在一位教授家的园子里干活，在那里我享受着脑力劳动之余和土地之间的接触。

Concerning our friend Ruburt… because of his rather intense mental work, I would suggest walks and other physical activities.

关于我们的朋友鲁柏，因为他的脑力劳动相当紧张，我建议他散步或进行其他身体活动。

Because especially for younger working people, because they might just involve more mental labor instead of manual labor.

因此， 尤其是对年轻的工作者而言，他们更多地从事脑力劳动而非体力劳动。

Brilliant! I'm glad my cognitive skills are still functioning. Now, how about hearing those words again?

太好了！我很高兴我还能胜脑力劳动。现在，让我们再听一遍那些词汇好吗？

Deliberate practice is hard mental work.

刻意练习是艰苦的脑力劳动。

Michael Osborne. And cognitive labour means using your noggin that's using or head! So computers and machines are using their noggins and getting smarter.

以上是迈克尔奥斯本的研究。脑力劳动是指用大脑或脑力工作。所以电脑和机器也在用它们的大脑，而且它们的大脑越来越聪明了。