To cause a great stir or disturbance among a large number of people; to alarm and mobilize a large crowd for an action.
为了寻找一只走失的宠物，小明一家竟然惊群动众，发动了整个小区的居民帮忙。
To find a lost pet, Xiao Ming's family surprisingly caused a great stir, mobilizing all the residents in the community to help.
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