Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.

The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.

让个人掌握他们的遗传信息是迈向更健康社会的第一步。

"The universe is a big place, perhaps the biggest."