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1.The study of the ecological indicators is crucial for understanding the impact of human activities on the environment.
研究生态指标对于理解人类活动对环境的影响至关重要。
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2. The government has set up a series of ecological indicators to monitor the environmental quality.
政府已经设立了一系列的生态指标来监测环境质量。
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3. The researcher used various ecological indicators to evaluate the effectiveness of the pollution control measures.
研究者使用各种生态指标来评估污染控制措施的有效性。