A random variation of size of resources and its effect on project duration, queue length and percentage utilization is highly desirable and deserves attention from the researchers.

一个随机变化的规模，资源及对工程的影响时间之长，排队的长度和百分比的使用率是非常可取的和值得重视的，由研究员。

youdao

Averaged across all species, temperature explained 16 per cent of beak size variation.

从所有种类平均来看，有16%的喙长差异原因可以用温度来解释。

youdao

Averaged across all species, temperature explained 16 per cent of beak size variation.

从所有种类平均来看，有16%的喙长差异原因可以用温度来解释。

youdao

In other words, some machine-based tutoring is approaching the effect size of real human tutoring and there is less variation than one might expect as the grain size of tutoring becomes finer.

FORBES: How Machine-Based Tutoring Could Disrupt Human Tutors

If the same techniques were applied across the world, the size of the oceanic carbon sink, and its variation year by year, would be known considerably better than the size of the land sink.

ECONOMIST: Climate change

In a 2009 paper Mr Glaeser and Matthew Resseger of Harvard University find that in highly skilled areas, city size explains 45% of the variation in worker productivity (it has almost no effect in underskilled cities).

ECONOMIST: Free exchange