使这些对策成为操作系统的一部分已经取得了一些成功，尽管它们当前还没有被广为使用。
There have been some successes in building countermeasures into operating systems, though they're not widely deployed at this time.
举例来说，当建立或拆开连接时，SIP服务还可以实现调用的阻塞或转发，以及带有对策和事务部门系统的界面。
For example, while setting up or tearing down a connection, SIP services can also implement call blocking or forwarding, as well as interface with gaming and back office systems.
现在，我们有很多对策方案可以通过减少不利的得失不均衡的状况，或通过与其它生态系统服务之间形成有利的协同作用，来保护或改善某些特定的生态系统服务。
Many options exist to conserve or enhance specific ecosystem services in ways that reduce negative trade-offs or that provide positive synergies with other ecosystem services.
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