n.地峡；[解]峡，管峡

In which part of the world is the Isthmus located? 苏伊士地峡位于世界的哪一部分？

The southern isthmus is always hot and humid. 南部地峡总是炎热和潮湿。

The thyroid gland has a right lobe and a left lobe connected by a narrow isthmus. 位于颈部气管前，由左右两叶及中间狭窄的的峡部构成。

The ablation target site was the isthmus between tricuspid valve annulus and inferior vana cava. 位于三尖瓣环和下腔静脉口间的峡部为消融部位。