birthn.分娩；出生；诞生；血统v.分娩；产生adj.有血亲关系的birth history生育史birth quality出生质量birthlessness无生birth culture生育文化birthwor root青木香birth fracture分娩骨折,产伤骨折birth specific类别出生率Birth-giving分娩birth interval生育间隔年限birth injuries产伤