pyloric sphincter

例句：

1. 1. The pyloric sphincter is responsible for controlling the flow of gastric juice into the small intestine.
   幽门括约肌负责控制胃液流入小肠的流量。
2. 2. The pyloric sphincter is a critical part of the digestive system that helps regulate the passage of food through the stomach and intestines.
   幽门括约肌是消化系统的关键部分，有助于调节食物通过胃和肠道的流动。
3. 3. In some cases, damage to the pyloric sphincter can lead to complications such as acid reflux and heartburn.
   在某些情况下，幽门括约肌受损可能导致酸反流和心burn等并发症。