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back to front
01
иметь очень хорошие знания о чем-то
used to indicate one's complete knowledge or understanding of something
IdiomWhat is the origin of the idiom "back to front" and when to use it?
The origin of the phrase "back to front" is not precisely documented, but it is an idiom used to describe a deep and thorough understanding or knowledge of a subject. It suggests that someone is highly familiar with every aspect, detail, or component of that subject, as if they have explored it completely from one end to the other, much like knowing both the front and back of a book.
Example
The engineer understands the construction plans for this bridge back to front.
She's an expert in astrophysics and can explain the universe's mysteries back to front.
After working in the industry for years, she understands the regulations back to front.
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