All yield over 50%, product purity over 98%.
产品纯度达98%以上,反应总收率50%以上。
The mean dividend yield over that period was 4.5%.
同期平均股息生息率为4.5%。
This process was characterized by simple flow sheet, low pollution, high product yield over 80%, and high product purity over 99%.
此合成工艺流程简单、污染小,产品收率大于80%,提纯后的产品纯度大于99%。
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