ribbing
US /ˈrɪb.ɪŋ/
UK /ˈrɪb.ɪŋ/

1.
罗纹, 筋
a series of ribs or ridges, especially in fabric or a structure
:
•
The sweater had a distinct vertical ribbing.
这件毛衣有明显的垂直罗纹。
•
The concrete structure featured strong steel ribbing for support.
混凝土结构具有坚固的钢筋以提供支撑。