(biology) a narrowing or constriction of a vessel or canal; especially a congenital narrowing of the aorta
造句
用作名詞(n.)
The characteristics of small faults are coarctation and zonation with clear direction. 小斷層具有密集成帶的特點，且方向性明顯，成為影響煤礦生產的主要地質因素。
The coarctation characteristic of capital of the real estate industry has determined that the real estate industry is a financial industry in fact. 摘要房地產行業的資金密集性特征決定了房地產行業實質上是一個準金融行業。