有些任务拒绝被中断，这使得它们是不可取消的。
Some tasks simply refuse to be interrupted, making them noncancelable.
曾有过拒绝服务攻击经历的运营商常说，事件至少会有一些影响，从轻微的服务中断，到持续的破坏和关键故障。
Operators who had experienced denial of service attacks often said the incidents had at least some effect, from minor service interruptions to sustained damage and critical breakdowns.
该计划要求保险公司终止各种不良操作，比如拒绝投保前已有受保病症的人入保或者在投保人最需要保险的时候中断保险协议。
It also requires insurance companies to end various nefarious practices, such as refusing to insure people with existing conditions or cancelling their coverage just when they need it most.
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