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停在港口的船是安全的,但那不是造船的目的。
To say something is to perform an action, and to perform an action is to do something with words.
The spirit of moderation should also be the spirit of the lawgiver.
学习理论中的一个关键见解是,假设类的复杂性对于泛化至关重要。
The eternal is the infinite.