Most babies have a closed ductus arteriosus by 72 hours after birth.大多数婴儿在出生后72小时内动脉导管闭合.Babies shed a layer of downy , slender hairs ( lanugo ) before or just after Birth.细毛,在出生前或出生后不久便脱落.Consequently, the problems such...
他把这起谋杀称为极其卑劣的行为。He described the killing as a dastardly act.他们什么卑劣的手段都使得出来。They will stoop to every low-down trick.多么肮脏、卑劣的伎俩！What a dirty, low-down trick!...
绝大多数机械装置都需要用油作为润滑剂。Most mechanical devices require oil as a lubricant.这颜料得用油调和.The paint has to be mixed with oil.用油酥面皮盖住边缘，每层之间抹些熔化的黄油。Let the pastry overhang the rim and brush between the layers with the melted butter....