机械和节省劳力的装置只有在降低制造成本时才具有价值。
How many roads must a man walk down before you call him a man?
过去越黑暗，未来越光明。
The PAC learning framework provides a formal way to analyze the efficiency and effectiveness of learning algorithms.
The best leaders are those most interested in surrounding themselves with assistants and associates smarter than they are.
宽容的力量比暴力的力量更强大。