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| English | Russian |
| primary and secondary actors | главный актёр и второстепенные актёры (См. Software Modeling and Design by Hassan Gomaa, а тж. Designing Concurrent, Distributed, and Real-time Applications with UML (Object Technology Series) by Hassan Gomaa ssn) |
| primary and secondary systems traits | первичные и вторичные характеристики системы (ssn) |