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相信自己能行，你已經成功了一半。

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

軟件開發中最重要的一個方面是清楚你要構建什么。