常見例句雙語(yǔ)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5萬(wàn)至10萬(wàn)名婦女罹患産科瘺，即産道出現(xiàn)瘺孔。 返回 obstetric canal