But there is much irony in the final lesson that Boeing has learned from Airbus.

可是波音从空客学到的最后一课却有些讽刺。

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And the final lesson we must learn as father is also the greatest gift we can pass on to our children — and that is the gift of hope.

我们身为人父应总结的最后一个教训，也是我们可以传给子女的最为贵重的礼物，就是希望。

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Limitlessness the final lesson you must learn is limitlessness, it is the sense that there are no boundaries to what you can become or do.

潜能无限你必修的最后一课是潜能无限，即没有任何东西可以限制你成为你想成为的人、做到你想做到的事。

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The final lesson is that you can impose painful spending cuts and still win elections.

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In fact, it is the final lesson Steve Jobs gave: let your family and loved ones know you in this life, today.

FORBES: The Final Lesson of Steve Jobs

And that is why the final lesson we must learn as fathers is also the greatest gift we can pass on to our children - and that is the gift of hope.

CNN: Obama's Father's Day speech