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взять инициативу в свои руки stresses
gen.	be proactive (segu); act proactively (segu); take charge (VLZ_58)
Игорь Миг	eat one's lunch
idiom.	take the ball and run with it (jouris-t)
Makarov.	take the lead; take up the running
mil.	take the initiative (jfklibrary.org Alex_Odeychuk)