This is a complex set of policies covering many aspects which have to be enforced by people as well as systems.
这是一个包括许多方面的复杂的策略组合，它需要由人和系统一同实施。
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Of course, any such operation presupposes the existence of a font covering multiple character sets or enough information to render a complex font to the screen.
There are many examples covering the range from simple (addition/subtraction overloading) to the complex (overloading numeric constants and run-time overloading).