“Mental arithmetic also requires the ability to retain order information in the short-term via rehearsal, and may be similarly affected by their performance in the presence of changing-state, background environments, ” he added.

“心算也需通过练习短时间内记住信息顺序，因此也可能受到背景环境影响，”珀罕补充道。

I wasn't good at doing sums in my head - you know - mental arithmetic.

我不擅长用脑计算，也就是心算。

But I got pretty good at it as a barman.

但我做酒保时很擅长心算。

Ove looks like he's counting the months in his head.

欧维看起来就像心算一共几个月。

I am afraid I could not help them much; indeed, if they came to accounts, I should be quite in the way, for I never could do sums in my head.

我恐怕帮不了他们多少忙；说实，是他们算起账来，我会完全碍，因为我从来不会心算。

They say it more precisely determines canine age. Their new method requires a little more than simple mental arithmetic to work out a dog's age.

他们表示，这种公式能够更准确地计算狗狗年龄。他们新方法需比简单心算稍微复杂一点方法来计算狗狗年龄。

They then completed a mental arithmetic test designed to capture cognitive abilities, alongside an auditory task testing reaction time.

随后，他们完成了一项旨评估认知能力心算测试，以及一项测试反应时间听觉任务。

Getting these answers right requires both a knowledge of financial vocabulary, and the ability to make mental calculations.

答对这些问题既需财务词汇知识，也需进行心算能力。

Psychologists have been trying to work out why mental arithmetic can bring us out in a sweat.

心理学家一直试图弄清楚为什么心算能让我们汗流浃背。

The sheer amount of mental computation required to understand one word, would be ridiculous.

理解一个词所需大量心算，将是荒谬。

Me doing the mental math to figure out what snacks are in front of me.

我心算，想弄清楚我面前零食是什么。

Like, so I'm thinking about the invention of the calculator and mental math, right?

就像，我想计算器发明和心算这件，对吧？

Mental math can be sort of a quick little exercise for your brain.

心算可以算是大脑一种快速小练习。

And so he had to do it all in his mind.

因此，他不得不全凭心算来完成。

Everyone is well-educated, enough that literally everybody can solve complicated math problems in their head.

每个人都是高学历，几乎所有人都能心算复杂数学题。

Did some quick mental math and tried to get.

做了一些快速心算并试图得到。

It used to scare me so much, but now after just a few hours or days playing my silly little math game and learning a couple of tricks, I might not be a mental math genius, but I'm not scared anymore.

它以前让我非常害怕， 但如今玩了几个小时或几天我小数学游戏， 学了几招后，我可能不是心算天才，但我再也不害怕了。

I tried doing the mental math of subtracting what I know from what I'm watching, and you can start to see, oh, there's a big circle of nothing in this.

我试图通过心算， 从我所知中减去我所看到，然后你开始意识到， 哦，这里有一个巨大空白圈。

But sometimes in class, or people want you to estimate percentages, and so you can impress people if you can do this in your head.

但课堂上有时，或者有人希望你能估算百分比，如果你能心算得出，就能给人留下深刻印象。

Paul did the mental arithmetic, said: " That's three short." " Why don't they have two carryalls to each crawler? " barked the Duke.

保罗心算了一下， 说：“少了三个。 ” “他们为什么不为每个爬行者配备两个手提包？ ” 公爵咆哮道。