例句與造句

1. Specific rules and prohibitions apply to menstruation, postnatal bleeding and irregular vaginal bleeding.
2. However, incidence of irregular vaginal bleeding may be higher with estradiol-containing contraceptives in relation to the fact that estradiol is a weaker estrogen than ethinylestradiol in the endometrium.
3. It's difficult to find irregular vaginal bleeding in a sentence. 用irregular vaginal bleeding造句挺難的