"extraordinary activity" is correct and usable in written English.
You can use it to describe a particular activity that is impressive or unique. For example: "The students at the school planned an extraordinary activity to celebrate their graduation."
Suspected extraordinary activity.
Much of the consolidation period's extraordinary activity involves diagnosing and studying these problems, then correcting them.
In addition to its extraordinary activity, this catalyst is also very stable and selective.
But I think it's entirely fair to say, on the basis of my researches and conversations, that hacking was not viewed as an extraordinary activity.
The extraordinary activity of Pt1Au1/(TiO2)1 NWs could be attributed to the synergistic effect of TiO2 and the durability attributed to Au and C skin.
The spherical catalyst made with multiple steps of impregnation in more dilute Mg, Ni, Co solutions each followed by calcination showed extraordinary activity and stability for 180 h TOS.
In other words, the "extraordinary" activities weren't awe-inspiring, just a little unusual.
They went to the building about midnight and saw signs of extraordinary activities around it.
In addition to workshops, seminars and discussions -- that's the Ideas part -- "all day, there will be extraordinary activities not listed in the brochures," Ms. Miller explained.
My Name is Mina by David Almond Mina's story is interwoven with her poems, interesting facts and "extraordinary activities" – "write an empty page.
Alanna Heiss, then the director of the P.S. 1 Contemporary Art Center in Queens, was among those who moved in, calling it "one of the most extraordinary activities I've ever attended anywhere in the world".
