The results show the tensile strength, yield strength, hardness and elongation increased obviously due to the decreasing of the grain size of pure Cu after severe plastic deformation.
研究结果表明：经过大变形后，由于纯铜的晶粒得以细化，抗拉强度、屈服强度、硬度和断裂延伸率都显著增加。
The dune sands are very well sorted and rounded pure quartz sand(>95%) with single mode grain distribution and without suspension materials.
沙丘砂由分选、磨圆好的石英砂组成，含量大于95%，具单众数粒度分布，无悬移质。
Biomass, grain yield (unhulled) and harvest index of 5 japonica hybrids, their parents and 3 japonica pure lines were studied in Nanjing and Hongze.
在南京和洪泽两地研究了5个杂交粳稻及其亲本和3个纯系粳稻的生物量、稻谷产量和收获指数。
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