sanitary towel
noun [ C ] UK uk/ˈsæn.ɪ.tər.i ˌtaʊəl/ us/ˈsæn.ɪ.ter.i ˌtaʊəl/ (US sanitary napkin); (Australian English sanitary pad)
卫生巾，月经垫
a piece of soft material worn by a woman to absorb blood during her period (= blood flow each month)