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be originally believed to be (+ past participle: The curious formations were originally believed to be found only in Africa's Namib Desert until scientists discovered a patch of the rings in a particularly arid part of Australia.  coasttocoastam.com ART Vancouver) | |||
| ранее считалось , что: 3 phrases in 2 subjects |
| Quotes and aphorisms | 1 |
| Scientific | 2 |