| 1 | We can learn from the experience and lessons of this project. | |
| 2 | We need to learn from our previous mistakes to avoid making the same ones again. | |
| 3 | Insufficient contingency planning can be a valuable lesson from unexpected events. | |
| 4 | He stubbornly refused to heed the warnings and ultimately paid a painful lesson. | |
| 5 | In real life, practical experience is often more useful than theoretical knowledge. |