In more advanced gestations fetal lung maturity tests may be performed via amniocentesis or on amniotic fluid samples aspirated from the vagina.是什么意思_In more advanced gestations fetal lung maturity tests may be performed via amniocentesis or on amniotic fluid samples aspirated from the vagina.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句