It was clearly an elaborately planned operation.

这显然是一次经过周密策划的行动。

《柯林斯英汉双解大词典》

It appears he was trying to escape the area before police moved in. The planned operation is the latest stage in a programme to reduce violent crime in Rio before the football World Cup in 2014.

显然他是想在警察来之前逃离此地，这次有计划的行动，是在2014年世界杯之前减少里约暴力犯罪行动的最新举措。

youdao

"This was a planned operation committed by a gang of desperadoes who were armed to the teeth, " he said.

BBC: NEWS | UK | Scotland | Glasgow and West | Motive mystery in abduction case

Clashes erupted Friday after local media reported about a planned operation to disarm prisoners at the facility in Uribana, the prison ministry said in a statement.

CNN: Report: Prison riot kills dozens in Venezuela

He says it was clearly a carefully planned operation and the crew were pleased to have come through the most difficult stage of the voyage without incident.

BBC: USS Abraham Lincoln in Strait of Hormuz voyage