一般来讲，条件接入系统的主要问题在于防止处于商业目的的盗用。

The main challenge of the conditional access system is normally to prevent commercial piracy.

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令牌PPV可以在并发有条件接入模式下运行标准订购、事件PPV或NVOD PPV。

The tokens PPV can be run as concurrent conditional access mode to standard subscription, Event PPV or NVOD PPV.

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就像Praekelt指出的：拥有这些条件，谁还需要具有网络接入功能的PC ？

As Praekelt stated, "with these capabilities, who needs a PC with web access?"

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