Drag onto the page. Drag yellow diamonds to resize hub circle, root circle, and outside diameter.

拖到绘图页上。拖动黄色菱形可调整中心圆、齿根圆和外径的大小。

youdao

It is the outside circle (tooth tip circle) of the external spline or the root circle of the internal spline.

它是外花键的外圆(齿顶圆)，和内花键的齿根圆。

youdao

By creating a circle of offending, punishing and re-offending, we are doing nothing about the root causes of these types of crime.

BBC: Pete Levy

It does address the root problem, defaulting mortgages, and Mr Bernanke has long worried that bad debt would fuel a vicious circle of crippled lenders, constricting credit, weakening growth and more defaults.

ECONOMIST: The financial crisis