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Light is the most important material in architecture.
The biggest risk is not taking any risk at all.
The best way to learn a new programming language is by writing programs in it.
保卫国家政权,是那些君主和臣子等享受俸禄的人谋划的事;保卫整个天下,即使是地位低微的普通百姓也有责任参与。