0 an action or story that teaches you how or how not to act, or that clearly shows the facts of a situation, usually a bad one -- 借鉴；经验教训
Have they forgotten what an object lesson that was in the utter futility of war.
Perhaps this is an object lesson: never try to be helpful; and never listen to anyone's arguments.
The route by which this conclusion is reached is an object lesson in the art of theoretical rhetoric.
Its history is in some ways an object lesson of how countries can go down in the league table of development as well as up.
We have an object lesson close at hand.
He was an object lesson in courage to all of us during the time that he suffered from kidney problems.
We have had a great object lesson during the war which has just closed.
For those and many other reasons it affords the best object lesson of the problems we have to face.
