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| essential role (VladStrannik); important part (ssn); critical part (to play a critical part Elusory) | |||
| significance (A.Rezvov) | |||
| importance (igisheva) | |||
| key or vital, or prominent role | |||
| important role (ssn); prominent role (ssn) | |||
| critical role (ssn); important concept (ssn) | |||
| vital role (oleg.vigodsky) | |||
| важная роль: 90 фраз в 16 тематиках |