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雖然這個(gè)世界充滿了苦難，但是也充滿了很多解決克服的方法。

Physics is not just about solving problems, it's about understanding the nature of reality.

I went to the woods because I wanted to live deliberately,I wanted to live deep and suck out all the marrow of life, To put to rout all that was not life, and not when I had come to die, Discover that I had not lived.