When tested with only one problem, a bucket of models can produce no better results than the best model in the set, but when evaluated across many problems, it will typically produce much better results, on average, than any model in the set.
当仅使用一个问题进行测试时，一组模型不会产生比集成中的最佳模型更好的结果，但是当针对许多问题进行评估时，它通常会产生比集成中的任何模型更好的结果。