an object lesson
成語所屬單字lesson
an object lesson — 慣用語
1. a very clear practical example of how something should or should not be done.
1.慣用語
釋義
這家醫院處理疫情的方式，是公共衛生危機管理的絕佳示範。
a very clear practical example of how something should or should not be done.
例句
The way the hospital handled the outbreak was an object lesson in how to manage a public health crisis.