to forget something accidentally
случайно что-то забыть (sluchayno shto-to zabyit)
"Sorry, it completely slipped my mind to call you."
"Извини, я совсем забыл тебе позвонить." (izvini ya savsem zabyl tebe pozvonit)
to take responsibility for something difficult
to feel very nervous about something
something that is too expensive or not worth its price
to retreat or withdraw from a situation
in the testing phase before final release
to finish something officially
