调查研究表明，饮用水的污染对健康不仅有近期效应，而且还带来远期危害。

The investigation shows, that polluted drinking water has not only immediate effect, but also more long-term harm.

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这一现象被认为是“近因效应”(或近期偏差)，即一种受近期数据模式过度影响的趋势。

This phenomenon is known as "recency bias", the tendency to be excessively affected by the pattern of recent data.

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瓶颈效应和突变-漂移平衡分析表明，鄱阳湖日本沼虾群体近期没有经历过瓶颈效应，群体数量也没有下降。

Bottleneck effect and mutation-drift equilibrium tests indicated that the M. nipponense populations in the Lake did not suffer bottleneck effect, and had no decline in their quantity in recent time.

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