These were not difficult concepts for Joe.
To give another perspective on the story, and to explain difficult concepts.
Doing that for three years means you're not intimidated by difficult concepts or problems.
Bryson enlivens his accounts of difficult concepts with entertaining historical vignettes.
One is the use of clay, or other materials, to help make difficult concepts less abstract.
"Difficult concepts that defy common sense come briskly to life," Michael Riordan wrote here in 1998.
It takes some thinking to get your head around it, but it doesn't involve learning lots of difficult concepts.
Mr. Alpert is an editor at Scientific American, and he specializes in providing clear, simple explications of difficult concepts.
He writes about difficult concepts with vivid details and stories, often jump-cutting from exposition to drama like a film.
Aesthetics, or perceptions of beauty, are among the most difficult concepts to identify in any musical culture.
Science writers showed themselves masters of the art of scientific storytelling, bringing difficult concepts within the range of ordinary readers.
