前: front囱: chimney; funnel; stovepipe枕下前囱径: suboccipital bragmatic diameter前从板座: front draft lug前次月经日期: pmprevious menstrual period前从动链轮: front idler sprocket前次月经,月经后期: past menstrual period前簇后拥: be escorted by big crowds in front and behind前次月经: past menstrual period， pmp; past menstrualperiod前促黑激素: pom proopiomelanocortin前次销售日期: date of last sale前村: maemura; qiancun前次剖宫产史: history of previous cesarean section
