Cairns等(1993)认为评价生态系统健康的指标可以按照功能分为三类：早期预警指标(Early warning indicator)，能及时确定即将发生的生态系统退化的指标，如敏感种个体的生长率、形态结构畸变和对化学物质的耐受力等；适宜程度指标 (Compli...
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RAAS的活性增高可作为易患高血压病的早期预警指标。
The increased activity of RAAS may be regarded as an early risk marker for EH.
在出口量占全部禽肉产量30%的巴西，作为潜在产量变化早期预警指标的日龄鸡苗价格大幅度下降。
In Brazil, where exports account for approximately 30 percent of total poultry output, the price of day-old chicks, an early warning indicator of potential production changes, is down sharply.
目的探讨重症急性呼吸综合征（SARS）患者中与重症发生相关的危险因素，寻找发生重症的早期预警指标。
Objective To explore the risk factors related to severe cases of severe acute respiratory syndrome (SARS) in order to find the early warning signs of deterioration of this disease.
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