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如果你每天都履行自己的義務，你就不必擔心未來。

However difficult life may seem, there is always something you can do, and succeed at. It matter that you don’t just give up.

"Books are the maps that guide us through life."

理論物理學之于數學，猶如雕塑之于幾何學。

經濟政策應根據其現實影響進行評估。