The key point to grasp about collaborative-filtering software is that it knows absolutely nothing about movies.

对于“协同筛选”软件，把握的关键点在于它对电影一无所知。

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Green Dam is a piece of filtering software that will reportedly be required for all PCs sold inside China.

绿色大坝是一块过滤软件，据说是要求所有在中国销售的PC。

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Some netizens think that the requirement for personal computers to be loaded with filtering software may violate the users' privacy.

有些网民认为要求个人电脑安装过滤软件可能会侵犯用户隐私。

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The other is to block the electronic path to objectionable material with filtering software.

ECONOMIST: China and the Internet

The study also found that 20 percent of parents are using the available Internet-filtering software and parental-control services.

CNN: Most older kids surf unsupervised

One tool Magid advises parents to use with caution, however, is Web filtering software like Net Nanny or Cybersitter, which block objectionable content online.

FORBES: On The Web's Edge