The preparation method has the advantages of simple and convenient process, easy operation, and high product yield.

本发明提供的制备方法，工艺简便，易于操作，产物产率高。

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The reaction condition of this method was simple and suitable for commercialization. The overall product yield was 58.5%.

该方法反应条件温和，原料廉价易得，操作简便，适合工业化生产，总收率可达58.5%。

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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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Gross margins are also taking a hit with new product yield issues and, with the overhead from the new production line, we could see gross margins hover around low 30% for several quarters.

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Since longer-maturity bonds offers higher yield in the current market, this kind of debt is mostly purchased by mutual funds, which want to offer a high-yield product to investors.

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Nonetheless, in a time when low rates push investors out on the hunt for yield, the relatively solid performance this year of the European and U.S. high-yield product seems to make for an attractive investment proposition.

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