If you want your kids to have strong self-esteem and the confidence that they can solve hard problems, those qualities won't magically materialize in high school.

如果你想让你的孩子拥有强烈的自尊心和解决困难问题的自信，这些品质不会在高中神奇地实现。

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If you want your kids to have strong self-esteem and confidence that they can solve hard problems, those qualities won't magically materialize in high school.

如果你希望你的孩子面对困难时抱有强烈的自尊和自信，这些品质不会在孩子高中时凭空出现。

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"I used to work very hard. I love to create things, grow them and solve problems," said Meng Li, a successful app developer in San Francisco.

旧金山一位成功的应用软件开发者李梦说：“我以前工作非常努力。我喜欢创造东西，让它们成长并解决问题。“

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I actually do get worked up over these things because it drives me nuts because these are not hard problems to solve and yet consistently throughout society and your own laptops there are dozens of examples I'm sure of poorly designed software.

我确实对这些东西很生气,因为它令我发狂,因为这不是很难解决的难题,然而贯穿整个社会,在你自己的笔记本上，我确信有很多这样,设计地很挫的软件的例子。

哈佛公开课 - 计算机科学课程节选

Quantum-computing researchers have actually managed to build one of their fabled devices (though it had only three qubits), and have worked out the mathematics that would allow a bigger machine to solve hitherto hard problems in cryptography.

ECONOMIST: Quantum computing

Many of these problems are hard to solve.

FORBES: The State of the Union? Not So Great

And talking straight to the American people about how we're going to solve these problems, and putting in the hard work of negotiations to get stuff done.

CNN: Transcript of Thursday's Democratic presidential debate