Not one, but two conference sessions were entirely devoted to the painful lessons of that catastrophe.
Lucky for you, there are several major areas in which we've learned some very painful lessons.
Thankfully we seem to be learning from those painful lessons of the past.
We should be learned from abroad in the painful lessons, timely adjustment of strategies and research methods, as little as possible detours.
Since the beginning of the teams despited many impressive achievements, but left more of a painful lessons, universities exposed many deficiencies than sports schools in training.
The tragic history of colonial people, the endless conflict between major powers, especially the two world wars, have left painful lessons in the history of mankind.
In recent years, mine catastrophes occur frequently. It not only makes us meet painful lessons once and again, but also reveals the legal blanks at the same time.
Over the past half-century, the rich world has learned slow and painful lessons about how to persuade people not to take up smoking, or to quit it if they already have.
Don't keep your company in mind. This is a lesson that has been learned by many painful lessons. Not all the people in the world are fit to sit in the world.
