心算

Secondly, crossover is the key operator in the genetic algorithms, and it is impetus for evolution.

其次，交叉算子是遗传算法的核心算子，是遗传进化的动力。

However, I found it to be incredibly draining -- both physically and mentally.

但是，我发现它令人难以置信排出--用心算和物理上。

RESULTS: Time to complete both mental math and reaction time was significantly longer during hypoglycemia.

结果：在低血糖时，完成心算的时间和反应时间均显著延长。

Can you do simple sum in your head?

你能做简单的心算吗？

In order to enlighten children' intelligence and provide the accountants with facilities for the position and calculation, we invent the reckoning tool according to the Jevons Experiment and the multi-points Effect Principle.

该项目可作为珠算心算启智教学专用教具，也可作为中小学生、幼少儿的学具，还可作为财会人员的计算工具、老年人的健脑保健用具乃至儿童玩具投入市场，使用前景十分广阔。

But it can also improve the brain's ability to do mental arithmetic.

它还能改善大脑做心算的能力。

The development of pupils mental arithmetic was studied in this article.

本论文深入研究了小学生心算能力的发展规律。

I was particularly good at mental arithmetic...

我特别善于心算，。。

He got the answer by mental arithmetic.

他得到的心算答案。

Researches attached more and more importance to the relationship between mental arithmetic development and working memory.

国内外的许多学者越来越重视儿童心算能力发展与工作记忆关系的研究。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。