catamenia n.[医]月经 emmenia n.[生理]月经 menstrual flow n.[生理]月经 三者都是月经的意思, 口语中常说 have a period . 卫生巾和护垫都是 sanitary towel.
Americ 月经MenstrualBleeding,Menstruation,Period,TimeoftheMonth,TheEnmyWithin2.卫生巾SanitaryNapkin,Tampon(卫生棉)3.护垫:Pantiliner
1 Menstruation 月经 ２ sanitary towel.卫生巾，护垫
menstrual=month+er+ual这是我对“月经的”这词来源的推测/ mens和month发音如此之近
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