一个人的幼儿时期，其实就是一种不断习得能力的过程，这个周期性的刺激，将带给儿童无限的欢乐和乐趣。

The highest manifestation of life consists in this: that a being governs its own actions.A thing which is always subject to the direction of another is somewhat of a dead thing.

The ultimate goal of machine learning is to make computers learn from experience and improve their performance over time.