| 释义 |
DEFINITIVE EXAMPLES 权威例句〔achalasia〕The failure of a ring of muscle fibers, such as a sphincter of the esophagus, to relax.弛缓不能：指肌肉纤维不能松弛，如食道内的括约肌美国传统〔pyloric sphincter〕A ring of smooth muscle fibers around the opening of the stomach into the duodenum.幽门括约肌：一圈光滑的肌肉纤维，位于胃和十二指肠中间开口附近美国传统〔sphincter〕A ringlike muscle that normally maintains constriction of a body passage or orifice and that relaxes as required by normal physiological functioning.括约肌：一般保持身体管道或通气口的收缩，并能在正常的生理作用下放松的环状肌肉美国传统 |