And we should actively transmit messages to readers. Change the state of passive service in library.

应主动传递信息给读者，改变图书馆被动服务的状态。

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In passive checking, Nagios does not spawn plug-ins to check status, but separate applications send status updates to Nagios periodically or when a state of a service has changed.

在被动检查过程中，Nagios并不产生插件以检查状态，而是不同的应用程序周期性地或者当服务状态发生更改时，将状态更新发送给Nagios。

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Availability is assured at the operating system level, allowing for transparent mitigation of active and passive network denial-of-service attacks.

它在操作系统级确保可用性，可以透明地缓解主动和被动网络拒绝服务攻击。

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Financial services firms that rely on brokers and advisors face a threat from online channels which are accumulating assets faster than full service firms, partly because of the growing popularity of passive investments such as index funds and ETFs, he added.

FORBES: Financial Advisors Are Adopting Social Media, Fitfully