Either complete abstinence from sexual activity, especially in females, or the virtuous exercise of it to just the right extent, for instance in the Catholic natural law tradition, solely in marriage, and solely in order to produce children.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。