Each chain can have a policy that defines "a default target", i.e. a default action to perform, if a packet doesn't match any rule in that chain.

每个链都可以有一个策略，它定义“缺省目标”，也就是要执行的缺省操作，当信息包与链中的任何规则都不匹配时，执行此操作。

youdao

The only purpose for this class is to serve as a target class to apply intercepting filter chain representing individual activities.

这个类的唯一目的就是作为应用代表各个活动的拦截过滤器链的目标类。

youdao

This command specifies the default target of the INPUT chain to be DROP.

该命令将input链的缺省目标指定为DROP。

youdao

Beginning in April 2013, Brightstar will be Target Mobile's new supply chain and point-of-activation technology provider, and MarketSource will be the in-store sales services partner.

ENGADGET: RadioShack's Target Mobile partnership to end on April 8th (update: Target picks new partners)

Last week we noted a pickup in call-side activity in retail giant Target on rumors that the discount chain might be looking to divest its credit card business.

FORBES: Magazine Article

If drug developers could better target their inhibitors farther down the prostaglandin chain, they might produce powerful drugs that could fight pain and avoid unknown, possibly fatal, side effects.

FORBES: Magazine Article