Subject + 动用 + 了 + Resource/Force
动用 (dòngyòng) means "to employ," "to mobilize," or "to use" and specifically refers to putting resources, forces, or authority into action. It implies a deliberate, often significant deployment of something held in reserve. For example, 动用军队 means "to deploy troops."
公司决定动用储备资金来应对这次危机。
Gōngsī juédìng dòngyòng chǔbèi zījīn lái yìngduì zhè cì wēijī.
The company decided to use reserve funds to deal with this crisis.
警方不得不动用大量人力搜寻失踪的孩子。
Jǐngfāng bùdébù dòngyòng dàliàng rénlì sōuxún shīzōng de háizi.
The police had to mobilize a large number of personnel to search for the missing child.
没有经过批准,谁也不能动用这笔钱。
Méiyǒu jīngguò pīzhǔn, shéi yě bù néng dòngyòng zhè bǐ qián.
Without approval, no one is allowed to use this money.