This study linked the functional domains of the GS3 protein to natural variation of grain size in rice.

本研究将GS 3蛋白质的结构域的功能与水稻种子籽粒大小的自然变异联系了起来。

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The results showed that the pollen shapes of all 11 cultivars were near spherical in equatorial view. The size of pollen grain showed great variation among cultivars.

结果表明：11份花粉都呈近球形，花粉粒大小在所观察的材料间有较大差异。

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Moreover, the inorganic carbon content was positively correlated with grain-size variation in general.

而无机碳含量总体与沉积物粒度变化呈正相关。

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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