语言选择:
免费网上英汉字典|3Dict

natural family planning

资料来源 : WordNet®

natural family planning
     n : any of several methods of family planning that do not
         involve sterilization or contraceptive devices or drugs;
         coitus is avoided during the fertile time of a woman's
         menstrual cycle
依字母排序 : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z