Terms containing reasons for signal processing

Subject	English	Russian
el.	primary reason for processing real-world signals	главная цель обработки физических сигналов (ssn)
el.	reason for processing real-world signals	цель обработки физических сигналов (ssn)
el.	reasons for processing real-world signals	цели обработки физических сигналов (ssn)
el.	reasons for signal processing	цели обработки сигналов (ssn)