| 释义 | 
		Example sentencessurveillance operation  Police began a surveillance operation in a flat opposite and spotted a child fitting the boy's description.The police are accomplished at collecting intelligence using long-term surveillance operations and disrupting plots.His police bosses were also preparing to mount a secret surveillance operation on him.  Seeclean-up operationSeesurveillance aircraftCOBUILD Collocationssurveillance operation  banking operation  cease operations  clean-up operation  commercial operation  continuing operations  covert operations  day-to-day operations  emergency operation  entire operation  expand operations  ground operation  intelligence operation  joint operation  knee operation  launch an operation  life-saving operation  military operation  mining operations  minor operation  mount an operation  need an operation  online operation  overseas operations  perform an operation  police operation  require an operation  resume operations  retail operation  routine operation  salvage operation  security operation  shoulder operation  smuggling operation  surgical operations  surveillance operation  suspend operations  trading operations  transplant operation  undercover operation  undergo an operation  undertake operations  |