词汇	occupy about
释义	occupy about 忙于,从事于
随便看	operational command and control flow operational command and control system operational command center operational command efficiency operational commander operational commanding operational command network Operational Command of Air Defence operational command opposition operational command psychology Operational Command Unit operational commitments operational commmad opposition operational communication system operational component operational computer operational computer complex operational concentration operational concept Operational Concept Demonstration operational Concept Description Operational Concept Document operational condition operational conditioning operational conditions