cross - section and profile的用法和樣例：
例句
- Thrust varies with elevation and is usually maximum at midheight.
它可以通過(guò)斷面上的應力的總和求得。 - 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(huà)出剖切面與機件接觸部分的圖形稱(chēng)為斷面圖，簡(jiǎn)稱(chēng)斷面。
