25 years of research

[Tofu]

Hello Alan, Mister Micawber, Beeesneees, Mordant and other native English speakers,

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http://www.oxfordadvancedlearnersdictionary.com/dictionary/result
This book is the result of 25 years of research.
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Can I say "25-year-long research" instead of "25 years of research"?

[Alan]

Hi Tofu,

'25 years of research' is fine. If you want to use your version, I would say: After a 25-year-long period of research.

Alan
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English as a Second Language
You can read my ESL story Present Simple

[Tofu]

Thank you, Alan.