to have a just cause for launching an expedition or undertaking a significant task; to act with legitimate reason
在进行这项改革之前，领导层已经做足了准备，可以说出师有名，确保了改革的顺利进行。
Before undertaking this reform, the leadership had made thorough preparations, so it can be said they had a just cause, ensuring the smooth progress of the reform.
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