截面

例句：

1. 1. The engineer drew a detailed cross-section of the bridge.
   工程师绘制了这座桥的详细断面图。
2. 2. The carpenter cut a facet from the wood to fit the door.
   木匠从木头上切出一个面来适配门。
3. 3. The scientist conducted an experiment to measure the sectional area of the sample.
   科学家进行了一项实验，以测量样本的横截面积。