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来源：雅诚德英语网
The true core of a real-time environment is that the system will guarantee to perform some task within a pre-defined time so that the system's behaviour becomes fully deterministic.
实时环境的真正核心在于，系统必须保证在预定义的时间内执行完指定的任务，这样它的行为才是完全确定的。