求翻译：难的好，第一有难度，挑战自己如果克服了，会很有成就感，举例，数学对我来说很难，但我通过上课听讲，大量练习，最终取得了好成绩，很开心是什么意思？

Difficult first difficult challenge themselves to overcome will be a sense of accomplishment, for example, math is difficult for me, but I am attending a lecture, a lot of practice, and ultimately achieved good results, very happy

It's good that the first would be difficult if you challenge yourself, overcome by a sense of achievement, it is, for example, a mathematical for me to say that it is difficult to attend classes, but I through lectures, exercises, and eventually made a lot of good results, a lot of fun.

Difficult good, first to have the difficulty, challenges oneself if has overcome, can have the sense of achievement very much, the example, mathematics is very difficult to me, but I through attend class listen, the massive practices, has finally obtained the good result, very happy

Well, the first difficulty, challenge yourself to overcome, a sense of accomplishment, for example, math is difficult for me, but I was in class through the lecture, a large number of exercises, finally has achieved good results, very happy

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