1. 安全期避孕法：Rhodopsin 视紫(红质) | Rhythm method 安全期避孕法 | Rib 肋骨

2. 节律法：rhythm judgment 节奏判断 | rhythm method 节律法 | rhythm of architecture 建筑的韵律

3. 安全期避孕,安全期避孕法：rhythm == 周期性变动 | rhythm method == 安全期避孕,安全期避孕法 | rhythm selection buttons == 节奏选择钮

noun

1. 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)

Synonym: rhythm method of birth controlrhythmcalendar method of birth controlcalendar method