语言选择:
免费网上英汉字典|3Dict

calendar method

资料来源 : WordNet®

calendar method
     n : natural family planning in which ovulation is assumed to
         occur 14 days before the onset of a period (the fertile
         period would be assumed to extend from day 10 through day
         18 of her cycle) [syn: {rhythm method of birth control},
         {rhythm method}, {rhythm}, {calendar method of birth
         control}]
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