We should learn a lesson from our mistakes so as to be a better person in the future.

我们要从错误中吸取教训，以便在将来成为更好的人。

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There is a lesson here for companies that become the flavor of the moment -- and then use that as a base from which to make forecasts for the future.

有些企业在一段时间内成为了时代的宠儿，又据此对未来做出了过于乐观的预期，哈雷的经验教训正好为这些企业上了一课。

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We get some experience and lesson from the results of experiment after analyzing and discussing. And the experience and lesson could improve our works and researches in the future.

对应五年制大专生化学学习评价的内容进行实验研究，并对实验结论进行分析和讨论，总结出了一些经验和教训，以促进今后化学学习评价研究的继续深入进行。

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If there is a lesson for the future of Islamic finance from medieval Christian finance, it is that the roots of its decline lay in societal changes to the fragmented, feudal society of Europe of its time.

FORBES: Magazine Article

In the end, the lesson from IBM and most of the other speakers at this event is that leaders have a vision for the future, leaders execute against that vision, and leaders know that only idiots focus on foolish wars.

FORBES: IBM's Best Battle Strategy May Be To Avoid Wars

One other interesting tidbit from HTC's presentation was the company's statement that it learnt its lesson from the Tattoo, which had a resistive touchscreen, and no longer plans on offering anything but capacitive displays in the future.

ENGADGET: HTC Wildfire hands-on (update: video!) Hands-on