If you specify an existing number when adding a rule to a chain, iptables adds the new rule before (or above) the existing rule.

如果你使用一个已经存在的整数向规则链中添加规则，新规则会自动加到那条规则的前面。

youdao

You can execute scalar rules fairly efficiently, and adding additional scalar tests or functions in a rule won't significantly impact the execution time of the rule.

可非常高效地执行标量规则，并可在规则中增加附加标量测试或者函数，而不会显著影响规则的执行时间。

youdao

That may be a generally good rule, but the problem is the world changes out from under you if you're not constantly adding to your skill set.

这也许不失为一条能让你“混”得下去的规则，但问题是世界每天都在发生变化，如果你不能持续为自己充电，你就会被这个世界淘汰。

youdao

Mr McLoughlin told the Commons that he would not "wholly rule out" putting a new runway at Heathrow, adding, to mocking laughter, that the way forward was to set up a working group.

BBC: New transport secretary's Heathrow baggage

"Far from giving us certainty, there is likely to be delay as developments are held up by appeals and by the courts having to rule on a new and untested approach, " Mr Benn said, adding that this would lead to "uncertainty and chaos".

BBC: UK Politics