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| Russian | English |
| в основе | at the very core ("Communication is at the very core of our society. That's what makes us human." – Jan Koum quotes from BrainyQuote.com VLZ_58) |
| в основе | deep down (Interex) |
| в своей основе | at its heart (The novel is, at its heart, a story of courage and perseverance.  ludwig.guru privetkrasa) |
| в своей основе | come down to (Interex) |
| лежать в основе | lie at the bottom of something (чего-либо Bobrovska) |
| лежать в основе | be at the bottom of something (чего-либо Bobrovska) |
| нечто лежащее в основе | cornerstone (the cornerstone of our product line – лежит в основе ART Vancouver) |