常見例句雙語例句A. Labor is characterized by uterine contractions of sufficient frequency, intensity, and duration to result in effacement and dilatation of the cervix.分娩的特征是頻率、強度和持續(xù)時間足夠的子宮收縮，使宮頸消退和擴張。blog.sina.com.cnPhase 1: Early (Latent)—thinning (effacement) and opening (dilation) of the cervix to 3 cm; contractions are 30 to 45 seconds long, 20 minutes apart or less.第一堦段：早期（潛伏期）-宮頸變?。ㄗ兊┖蛿U張（或開大）到三厘米：宮縮頻率爲20分鍾上下一次，每次持續(xù)30-45秒。 返回 effacement of cervix