Nuts and Bolts

Its April of 2017 and Day 14 of A to Z Challenge. I am doing Idiom a day and 8 line poem for the idiom.

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Idiom: Nuts and Bolts

Meaning: the practical facts about a particular thing rather than theories or ideas about it, most essential components of something

Poem:
Nuts and Bolts,
The ones memorized,
Could be under-fit, over-fit.
From effortless smiles, 
To immense discoveries,
The Nuts and bolts of it,
Is to understand,
Appreciate and Apply.

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Note: All the challenge prompts can be found HERE.