This has, as we know, steadily risen over the centuries because of the increasing relative costs of the means of securi ty, the scope of military actions, and the perceived need of po lice actions.

• 如我们所知，这部分由于保安手段的相对成本、军事行动的范围，以及对警察行动的需要增加，而在过去几个世纪里稳定提升。