Through test analysis, we found that it is caused by the large size grain in this section, as well as the structure stress in this section over the material strength.

经试验分析是由于该段晶粒粗大，淬火时组织应力超过该段的材料强度所致。

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I managed to take one optically stimulated luminescence (O.S.L.) sample at the suspected delta, as well as a few samples for grain size analysis.

我试着在怀疑是三角洲的地方带一个光释光样本，并带一些样本用于晶粒尺寸分析。

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Batteries that are the size of a grain of salt — or smaller — could power sensors that detect viruses, chemicals and more, said Philip Collins, a scientists at the University of California, Irvine.

加州大学欧文分校的的科学家菲利普·科林斯说，尺寸如盐颗粒大小的电池能够给传感器提供动力，为那些用于检测病毒和化学物质等传感器提供动力。

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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

And have your vet inject your pet with a tiny microchip implant (it's about the size of a grain of rice).

CNN: Tips for road tripping with pets

Micro chipping involves a vet inserting a tiny device, about the size of a grain of rice, under the dog's skin.

CNN: Give a dog a cell phone