这是贯穿该党各项政策的一条准则。

It is a principle that underlies all the party's policies.

《牛津词典》

关于包括放血和柳叶刀程序在内的最佳注射实践政策指南和准则已可供使用。

Policy guidance and guidelines on best practices are available for all injections including phlebotomy and lancet procedures.

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但是联军指挥官坚称，他们的轰炸目标政策和战斗准则皆未改变，战机出击比率也一直维持。

But coalition commanders insist that their targeting policy and the rules of engagement are unchanged and that the sortie rate has been maintained.

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