n.定界线；划界；限界

The study's delimitation focused solely on adolescents aged 13 to 18, excluding younger or older individuals.
研究的范围限定仅集中在13至18岁的青少年，排除了更年轻或更年长的个体。
One of the key delimitations of the project was the decision to analyze data only from urban areas, ignoring rural data.
项目的关键限制之一是决定只分析城市地区的数据，忽略了农村数据。
Due to resource constraints, the delimitation of our market research was confined to the Southeast Asian region.
由于资源限制，我们市场研究的范围限定在东南亚地区。
The experimental design included a clear delimitation of the control group, ensuring no interference from external variables.
实验设计明确界定了对照组，确保没有外部变量的干扰。
The delimitation of the survey to online respondents might have introduced bias in the results, as it excluded those without internet access.
调查对象限定为在线受访者，这可能在结果中引入了偏差，因为它排除了没有互联网访问的人群。
In setting the project's scope, we established a clear delimitation between primary and secondary research methods.
在设定项目范围时，我们明确了主要和次要研究方法之间的界限。
The delimitation of our customer base to premium users for this marketing campaign allowed for more targeted messaging.
我们将客户基础限定为此次营销活动中的高级用户，这使得信息传递更加有针对性。
A major delimitation of the study was the reliance on self-reported data, which may be subject to bias.
研究的一个重大局限性是依赖自我报告的数据，这些数据可能受到偏见的影响。
The geographic delimitation of the wildlife conservation area excluded human settlements, focusing solely on preserving natural habitats.
野生动物保护区的地理范围界定排除了人类居住区，专注于保护自然栖息地。
The time delimitation of the historical analysis spanned from 1900 to 2000, intentionally leaving out events before and after this period.
历史分析的时间范围限定从1900年到2000年，有意忽略了这一时期前后发生的事件。