把中英文版本都贴出来,以便对照检查.

"该药由威斯(Wyeth)药业公司生产， 与传统避孕药相似，只是没了安慰剂成分。一般情况下，要使避孕期达到一月有效，就需服用四至七天药物，这会带来月经；"

"Made by Wyeth Pharmaceuticals, the new contraceptive is similar to the conventional Pill — minus the placebos. Typically, a month's worth of birth control pills includes four to seven days of placebo pills, which trigger menstruation."