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But in return,Heller's surfing adventure helped him learn a valuable lesson about catching the perfect wave in life.
VOA: standard.2010.08.04
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There is a spiritual lesson that we can learn.
我想从中我们也能学到一些关于灵性的体验。
普林斯顿公开课 - 人性课程节选
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And this is a hugely important lesson to learn.
这么问自己,这是不是一个隐藏的。
麻省理工公开课 - 计算机科学及编程导论课程节选