这项研究涵盖了不同年龄和职业的人群，形成了一个很好的社会横截面。

The study includes people of different ages and professions, forming a good ___cross-section of society.

这张图展示了苹果的横切面，可以看到种子如何排列。

This picture shows a ___cross-section of an apple, revealing how the seeds are arranged.

医生通过查看器官的横截面来诊断病情。

The doctor examined the organ's ___cross-section to diagnose the condition.