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The rise of a new great power is always a cause for concern among existing powers, as it threatens the existing balance of power.

世界是一本書，不旅行的人只讀了一頁。

Model checking is a powerful tool for verifying the correctness of hardware and software systems.

The first duty of the sovereign， that of protecting the society from the violence and invasion of other independent societies， can be performed only by means of a military force.

電影的主題應(yīng)該從電影本身中浮現(xiàn)，而不是強加于它。