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为什么这东西叫美国梦,因为你只有睡着了才能相信。
The reason they call it an American Dream is because you have to be asleep to believe it.
你停止尝试变得更好的那一刻就是你开始变得更糟的那一刻。
Sustainability isn't an option - it's our responsibility to future generations.
每个数学问题都有一个解决方案;只是需要时间和努力去找到它。