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人生起落无常,低谷时别放弃。  
In machine learning, the trade-off between bias and variance is crucial for achieving good generalization.
Innovation often happens at the boundaries of different fields.
译文:有田不去耕种,仓库就会空虚,有书不让孩子去读,子孙后代就会愚昧无知。赏析:蜂采百花酿甜蜜,人读群书明真理。不吃饭则饥,不读书则愚。鸟欲高飞先振翅,人求上进先读书。不论我们的生活多么糟糕,都要让我们的孩子多读书。