They issued a special set of stamps to mark the occasion.

他们特别发行了一套纪念邮票。

《牛津词典》

There's no special set up, no large disk images.

不需要特殊的设置，不需要庞大的磁盘映像。

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A special set of stamps has been issued marking the event.

为此还特别发行了一套邮票来纪念这件事。

youdao

Today,Frank Oliver and Doug Johnson tell about a special plane called Voyager and the effort to set a difficult world record.

VOA: special.2010.10.06

Another was a set of special instruments that helped measure the effects of the sun's radiation on the outside of the aircraft.

VOA: special.2010.07.07

Medical workers have set up a special clinic on the island to treat flu patients, and the government has flown in supplies of antiviral drugs.

VOA: standard.2009.07.24

It takes a special set of skills to be successful in finding and keeping a marketing job.

FORBES: The 10 Companies Hiring The Most In Marketing Right Now

That means regarding it as dominant, from which flows a special set of restrictions on its activities.

ECONOMIST: Tests for television

As a background matter, foundations must follow a special set of tax rules in order to avoid certain penalties.

FORBES: Why Program-Related Investments Are Not Risky Business