With hindsight it is easy to say they should not have released him.

事后才说他们本不应该释放他，这倒容易。

《牛津词典》

Suddenly the shark released him.

突然鲨鱼放开了他。

youdao

The manager released him to return to his native town to visit his grandmother who was ill in bed.

经理准许他休假回老家探视染病在床的祖母。

youdao

They could hold him until the crew released the captured Somali.

VOA: special.2009.05.27

Barcelona have successfully lobbied for Messi to be rested, having reluctantly released him for the Olympics.

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After the assassination, the police arrested Mr. Raviv, but released him a short time later.

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Police arrested Mr Lawley Wakelin on suspicion of breach of the peace but later released him without charge.

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