“natural family planning”的概念、定义、翻译、参考文献-科学参考

单词	natural family planning
释义	natural family planning Encyclopedia 医学避孕释 natural family planning自然避孕法根据女性月经周期和周期中出现的症状与体征，间接判断排卵过程，识别排卵前后的易受孕期，进行周期性禁欲而达到避孕的方法。又称安全期避孕法。
随便看	Steel steel steel and concrete composite structural member steel andreinforced concrete gravity platform steel arches steel band steel bar steel bar bender steel bar cold-drawing machine steel bar cold-extruding machine steel bar molding steel bar processing machinery and prestressed machinery steel-bars truss deck steel bar truss molding machine steel beam steel beam for emergency repair of railway steel-belt sorter steel bonded cemented carbide steel braced frame steel braced frame structure system steel bridge steel bridge erection steel bridge fabrication steel building structure steel butt welding machine

科学参考收录了854744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。