n.地峽；[解]峽，管峽

In which part of the world is the Isthmus located? 蘇伊士地峽位于世界的哪一部分？

The southern isthmus is always hot and humid. 南部地峽總是炎熱和潮濕。

The thyroid gland has a right lobe and a left lobe connected by a narrow isthmus. 位于頸部氣管前，由左右兩葉及中間狹窄的的峽部構(gòu)成。

The ablation target site was the isthmus between tricuspid valve annulus and inferior vana cava. 位于三尖瓣環(huán)和下腔靜脈口間的峽部為消融部位。