Inglés ⇄ Ruso +

draw a line in the sand acentos
idiom.	обозначать свою позицию (Obama generally starts talking tough only to draw a line in the sand, erase it and then keep conceding ground to his opponents until they get most of what they want. iVictorr)
prov.	дать зарок (SergeiAstrashevsky); заречься (SergeiAstrashevsky)
Draw a line in the sand
gen.	определить ожидаемые результаты (fluent)
idiom.	поставить ультиматум (to create or declare an artificial boundary and imply that crossing it will cause trouble. thefreedictionary.com Pooh)