| 单词 | birth control pill | 
| 释义 | birth control pillnoun  : any of various preparations that usually contain both a progestin (such as norethindrone) and an estrogen (such as ethinyl estradiol), are taken orally especially on a daily basis, and act as contraceptives typically preventing ovulation by suppressing secretion of gonadotropins (such as luteinizing hormone)  called also oral contraceptive | 
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