On top of this are the various proprietary systems that combine to form OS X.
在这之上，则是各种不同的专有系统，组合在一起构成了Mac OS X。
IT gives users secure access to data, IT resources, transactions, and processing power that were previously locked up in proprietary systems, so they can better address their clients' needs.
它使用户可以安全地访问数据、IT资源、事务以及先前被限制在私有系统上的处理能力，因此，那些公司可以更好地满足客户的需求。
Apple, Microsoft and Sony all compete with proprietary systems.
苹果、微软与索尼都在就专有系统进行竞争。
Proprietary systems are easy to outgrow: Adding more phone lines or extensions often requires expensive hardware upgrades.
传统电话系统更新换代的方法是添加更多电话线或扩容，这通常要求昂贵的硬件升级。
Proprietary systems are easy to outgrow: Adding more phone lines or extensions often requires expensive hardware upgrades.
传统电话系统更新换代的方法是添加更多电话线或扩容，这通常要求昂贵的硬件升级。
应用推荐