optical section的用法和樣例：
例句
- This microscopic cross section of the aorta demonstrates a red blood clot that is compressing the aortic lumen.
鏡下主動脈切面中的紅色血塊表示縮小的主動脈夾層。 - When an assumptive cutting plane is passed through an object, the cross section is drawn, which is called a cut.
假想用剖切平面將機件的某處切斷，僅畫出剖切面與機件接觸部分的圖形稱為斷面圖，簡稱斷面。
