Phytoplankton as indicators of environmental change

浮游植物可作为环境变化的指示生物

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Some of these responses have previously been used as indicators of an emotional reponse in animals.

这些反应曾被用作动物情绪反应的指标。

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They can also have an important role in the ecosystem as top predators or as indicators of overfishing.

它们无论作为顶端掠食者还是过分捕捞的指示生物都在生态系统中扮演着重要的角色。

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Hundreds of indicators are used to measure progress in areas such as education,health,poverty, the environment and trade.

VOA: special.2010.04.26

Are there other indicators or tricks or rules of thumb that just off the top of your head come to you as useful mechanisms for doings this as well?

当然还有没有其他的,一些暗示或者说技巧,或者规则之类有用的办法呢？

哈佛公开课 - 计算机科学课程节选

"Some positive signals have appeared in the last weeks, including the evolution of the financial markets, improvement in business expectations and some real indicators, such as export data in Asia,pointing, all of them, to a stabilization of the economy in the second part of this year and a gradual recovering in 2010,".

VOA: standard.2009.05.04

But as indicators of a pitcher's effectiveness, we went ahead and gave them some weight.

FORBES: The Case For Clemens And Cooperstown

Certain types of fish and turtles serve as indicators of changing seasons or exceptional events.

UNESCO: Social and Human Sciences

In America and Britain the shrinking supply of government bonds has made bond yields less reliable as indicators of inflationary expectations.

ECONOMIST: Coping with surpluses