фронтир
| исследований
| фронтир | |
| obs. | frontier; frontier |
| исследование | |
| gen. | investigation; research; exploration; examination; analysis; treatise |
| |||
frontier; frontier (амер. ист.  wikipedia.org) | |||
|
фронтир : 13 phrases in 2 subjects |
| General | 2 |
| Research and development | 11 |