The police have launched a major operation against drug suppliers.

警方发动了一次打击毒贩的大规模行动。

《牛津词典》

He is having a major operation.

他正在接受一次大的手术。

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Weight-loss surgery is a major operation.

这是大手术。

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That includes Bill Clinton. He had a major operation because of blockages in two thousand four.

VOA: special.2010.02.17

President Obama, at his first major press conference, called on a reporter for a Web-only operation, the Huffington Post.

VOA: special.2009.03.21

He accepted the award in a wheelchair after a minor operation became major ankle surgery.

VOA: special.2010.06.02

Though well liked, particularly among his 30-something peers, Silverman has little to no experience developing content--or managing a major operation.

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It's a major operation, and she didn't want to take any chances.

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But a British expert said that while giving only a local anaesthetic for such a major operation had advantages, it also involved extra risks for the patient.

BBC: Heart bypass - with local anaesthetic