n.括约肌
Some surgeries and drugs could lead to the sphincter of Oddi dysfunction. 某些外科手术或药物会引起奥狄氏括约肌机能障碍。
If the sphincter does not work properly, stomach acid flows into the oesophagus. 如果括约肌不及时工作，胃酸就会进入食管。
