He never went to college; he was educated in the school of hard knocks.他从未上过大学，而是从奋斗经历中受教育的。We know boxers are rugged individuals who have graduated from the school of hard knocks and don't faint at the sight of blood.我们知道外表粗犷的拳击手都是从艰苦的训练中历练出来的，他们不会因为看到流血就倒下。