紧急情况下，总统签署了军队动员令。

The president authorized the ___mobilization of troops during the emergency.

军队的快速动员确保了边境地区的安全。

The rapid ___mobilization of troops ensured security in the border region.

社区领袖们正在组织一次大规模动员，号召居民参与环保活动。

The community leaders are organizing a large-scale ___mobilization to encourage residents to participate in environmental activities.