to learn by heart 牢记,会背,记住,背下...learn the ropes 学会事情的内情,学会事情的窍门...learn sth the hard way 通过艰难困苦而学到某事...learn sth from the ground up 从头开始学(某事)...learn by rote 死记硬背地学习...learn one's lesson 吸取教训...learn sth. the hard way 艰难地学到某事...learn from 向...学习...learn by heart 记住...learn of 听说...,获悉......
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