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期權的真正價值不在于其價格，而在于它為持有者提供的靈活性。

煤炭的真正成本不僅在于價格，還在于我們如何管理其后果。

The difference between fiction and reality? Fiction has to make sense.

無人機的未來屬于那些敢于突破邊界的人。

You have to believe in yourself when no one else does.

The challenge in computational learning theory is to understand the capabilities and limitations of learning algorithms.