Proxy servers are commonly used for content caching, Internet connectivity, security, and enterprise content filtering.
代理服务器通常被用作内容缓存，因特网连接，安全，以及企业内容过滤。
Zango contended that immunity was meant to cover only Internet service providers, not companies that provide access to tools for filtering content.
Zango辩称法律规定的免责权只对网络服务提供商适用，而并不对提供内容过滤软件的公司适用。
Nowadays, the popular Internet filtering and search system relies mainly on text content, there is little image search system.
摘要目前，网上流行的过滤和搜索系统主要是依靠文本内容，很少有图像搜索系统。
Nowadays, the popular Internet filtering and search system relies mainly on text content, there is little image search system.
摘要目前，网上流行的过滤和搜索系统主要是依靠文本内容，很少有图像搜索系统。
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