radial section的用法和样例：
例句
- This microscopic cross section of the aorta demonstrates a red blood clot that is compressing the aortic lumen.
镜下主动脉切面中的红色血块表示缩小的主动脉夹层。 - When an assumptive cutting plane is passed through an object, the cross section is drawn, which is called a cut.
假想用剖切平面将机件的某处切断，仅画出剖切面与机件接触部分的图形称为断面图，简称断面。
