Work efficiency is an important index evaluation work ability.

工作效率是一个重要的指数评价工作能力。

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Land use efficiency is an important index to measure the level of land use.

用地效益是衡量土地利用水平的一项重要指标。

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The specific surface area is an important index in measuring the strength of cement.

水泥比表面积是衡量水泥强度的一个重要指标。

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There's an index committee that keeps bringing in new shares when new companies become important; they try to get the 500 representative of the most companies in the world--in the U.S.

有一个指数委员会在新公司发展壮大的时候,一直持续替换新股,他们希望在美国,用500指数来反映,世界上大部分的公司

耶鲁公开课 - 金融市场课程节选

This is because the Google index assumes that a link is indicating that the page is useful and or important and thus makes it important inside the index.

FORBES: Google Should Ban Google Chrome from the Google Index

For instance, the important ISM Mfg Index has risen each month since October, reaching 54.1 in January.

FORBES: Feeling That European Springtime Swoon Coming On Again

The dollar index violated important support last week suggesting that some are not expecting the debt ceiling to be raised.

FORBES: The Week Ahead: For Stocks, The Debt Ceiling's the Limit