To mobilize a large number of people or resources for a significant undertaking; to deploy a multitude of people for a task.
为了确保这次文化节的顺利举行，筹备组不得不行军动众，提前做了大量准备工作。
To ensure the smooth running of this cultural festival, the preparatory team had to mobilize a great number of people and make extensive preparations in advance.
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