实施通过命令链传达目标，实施策略。
The act of carrying out a strategy by communicating goals through the chain of command.
第二条命令只是从OUT put链删除编号为3的规则。
The second command simply deletes rule number 3 from the OUTPUT chain.
该命令将input链的缺省目标指定为DROP。
This command specifies the default target of the INPUT chain to be DROP.
a或——append：该命令将一条规则附加到链的末尾。
A or — append: This command appends a rule to the end of a chain.
P或 --policy ：该命令设置链的缺省目标，即策略。
P or --policy: This command sets a default target, i.e. policy, for a chain.
该命令将一条规则附加到链的末尾。
这个小组执行的命令是开发一个绿色供应链管理（SRM）系统。
The mandate of this group is to develop a green supply chain management (SRM) system.
这个小组执行的命令是开发一个绿色供应链管理（SRM）系统。
The mandate of this group is to develop a green supply chain management (SRM) system.
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