contractions of alimentary canal的用法和樣例：
例句
- Peristalsis in the body of the esophagus is under vagal control.
食管本體的蠕動(dòng)受迷走神經(jīng)支配。 - Peristalsis in the large intestine pushes waste toward the anal canal and is important in removing gas and dislodging potential bacterial colonies.
大腸內的蠕動(dòng)將糞便推入肛管，在排出結腸內的氣體及抑制細菌生長(cháng)方面發(fā)揮十分重要的作用。
