The purchasing managers' index, a closely-watched gauge of activity, rose in May to its highest since October.

经理购买指数，监测经济活动的重要指标，五月份上涨到去年十月以来的最高值。

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This study put forward a dynamic contingency model of assessment index system based on a five stage activity-decision theory.

提出划分研究开发项目过程的五阶段活动决策方法，并在此基础上建立了动态权变的评价指标选择模型；

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The results show that the southeast Pacific is a key area for researching ACW. Then the activity index of ACWs over the southeast Pacific (EPAI) is defined.

结果表明，东南太平洋是研究南极绕极波动(ACW)的关键区，并由此定义东南太平洋acw活动指数(EPAI)。

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Some of these have a longer lead time relative to economic activity than others, so the firm publishes both a longer leading index, which signals changes in activity about a year in advance, and a shorter leading index, which looks six months ahead.

ECONOMIST: Leading economic indicators

Kauffman bases its entrepreneurial activity index on a monthly population survey jointly sponsored by the Census Bureau and Bureau of Labor Statistics.

WSJ: Rise in Start-Ups Draws Doubters

The eurozone's services activity index slowed to a two-and-a-half year low, to 53.1, in December--it had been at 58 in August.

FORBES: Europe's Recession Woes