To plan broadly and use sparingly; to make ample preparations for potential needs but use resources conservatively; to leave room for contingencies.
在制定旅行计划时，最好宽备窄用，多准备一些应急物品，但实际只用必需品。
When making travel plans, it's best to "plan broadly and use sparingly," preparing some extra emergency items, but only using what's essential.
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