The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

The ability to generalize from limited data is a hallmark of effective learning algorithms.

世界充满了美，但也充满了痛苦和苦难。

The greatest education in the world is watching the masters at work.

教育是维持负责任的林业实践所有进步的根系。