The character projects have been listed as the first grade index in the undergraduate course teaching evaluating.

本科教学评估中，特色项目被列为了一级指标。

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From the results we know gross profit and NPV have obviously improved after optimization, so its reasonable for optimization grade index on this mine.

结果表明，优化后该矿的总利润和净现值有了明显的提高，说明将该矿的品位指标进行优化是合理的。

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This paper put forward a new method to carry out dynamic appraisal of the extent of resources utilization in each stage of gold mine production by using differential grade index.

文中提出了应用级差品位指标动态评价岩金矿山生产各阶段资源利用程度的新方法。

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It makes sense for the investment-grade bond index to do better once its worst credit has dropped out.

ECONOMIST: Credit markets

The Barclays Capital U.S. Aggregate Bond Index is an investment-grade domestic bond index.

FORBES: Investor Fears Exceed Actual Risks: 2013 Is Full Of Opportunities

That said, the Bank of American Merrill Lynch High-Grade Bond Master Index is up 3.75% through April 30 as a result of spread compression across the credit markets from the more lofty levels of the fourth quarter.

FORBES: Connect