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

一下子考中金榜题名，但没有十年的努力不可能官至宰相。

唯有勇者配得上美人。

"Imagination is more important than knowledge."

Laughter and tears are both responses to frustration and exhaustion. I myself prefer to laugh, since there is less cleaning up to do afterward.