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解释:屋顶是否有漏洞,下面的人才知道。
I don't believe in happy endings. Life is not like that.
The beauty of mathematics lies in its ability to describe the universe in the most elegant way possible.
You don't have to be a rock star to want to change the world.
只有一件事能让梦想变得不可实现:对失败的恐惧。