tortuosity

The tortuosity of the mountain road made the drive much longer than expected.

山路的曲折使车程比预想的漫长得多。

Researchers measured the tortuosity of the porous material to understand how gases diffuse through it.

研究人员测量了多孔材料的曲折度，以了解气体如何在其间扩散。

The river's tortuosity increases as it flows across the flat plain.

河流流经平坦平原时，其曲折程度会增加。