为了评估志愿者成长环境的影响，研究者根据志愿者15岁之前在大城市，城镇或者农村生活时间的长短，为每个人制定了一个大城市指数。
To assess any effect of where the volunteers grew up, the researchers assigned each an "urbanicity" score based on how many years they'd spent by age 15 in a city, town or rural area.
研究结果提供的证据明确表明，暴露在吸烟环境中产生的负面影响是显而易见的并在出生时是可以评估的。
The study results were seen as clear evidence that the negative effects of cigarette exposure are apparent and assessable already at birth.
这项研究帮助机构部门识别并理解影响健康和环境的过程，有助于EPA评估由人类和生态系统造成的污染的风险系数。
This research helps the Agency identify and understand the processes that affect our health and environment, and helps EPA evaluate the risks that pollution poses to humans and ecosystems.
本文的研究可以为污染物环境影响评估方法的应用以及火用分析方法中基准环境模型的确定提供指导与参考。
The research in this paper can provide the method instruction for the application of the environmental impact evaluation methods and the determination the reference environmental model.
研究目的是为评估环境中重金属对河川沙塘鳢早期发育各个阶段的影响提供理论依据。
The purpose of this study is to provide information that may help to evaluate pollution effects on early life stages of O. obscures.
因此，在把生物技术介入农业时，很重要的一点就是要对大环境做研究和评估分析，比如成本效益和对环境的影响。
Thus, in introducing biotechnology in agriculture, it is vitally important to study and assess the overall circumstances, such as cost effectiveness and impact on environment.
在总结国内外环境影响评价(EIA)有效性研究的基础上，提出EIA有效性评估的指标体系、分级标准和评估方法。
Based on the summary of internal and external studies on the effectiveness of environmental impact assessment (EIA), the indicator system, grading standards, and evaluating method are built up.
在总结国内外环境影响评价(EIA)有效性研究的基础上，提出EIA有效性评估的指标体系、分级标准和评估方法。
Based on the summary of internal and external studies on the effectiveness of environmental impact assessment (EIA), the indicator system, grading standards, and evaluating method are built up.
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