基本解释产道英汉例句双语例句Each year between 50 000 to 100 000 women worldwide are affected by obstetric fistula, a hole in the birth canal.全世界每年有5万至10万名妇女罹患产科瘘，即产道出现瘘孔。obstetric canal更多例句词组短语短语soft obstetric canal damage 软产道损伤soft obstetric canal 软产道obstetric canal更多词组专业释义医药科学产道