The radius from the axis of rotation — - the axis of rotation is here — and the distance from here to here, though you may not think so, is about 15 meters.

半径是这个转动轴-，转动轴在这里-，距离从这里到这里，你们也许想不到，有15米。

youdao

Let's say I have a cylinder of radius a centered on the z-axis.

已知以z -轴为轴心半径为a的圆柱体。

youdao

Conclusion:The cause of many complications after cutting radius head is ulnohumeral joint loading disorder and longitudinal axis unstability.

结论：桡骨小头切除后肱尺关节载荷紊乱及纵轴失稳是多种术后并发症的原因。

youdao

Another way to represent a point in a plane is I've got a radius and I've got an angle from the x-axis, right, and that's a standard thing you might do.

平面上面的点的方法,也就是极坐标,上面那种方法其实是，如果你们喜欢我这么说的话,笛卡尔坐标表示法。

麻省理工公开课 - 计算机科学及编程导论课程节选