to be in constant conflict or fighting
быть в постоянном конфликте или борьбе (byt' v postoyannom konflikte ili bor'be)
"The two brothers were at each other’s throats all day."
"Два брата были друг другу в горле весь день." (Dva brata byli **drug drugu v gorle** ves' den'.)
To put in more effort than is expected
to quickly embrace an idea or connect with someone
A silly or foolish person.
To innovate quickly, even if mistakes happen along the way.
to be upset about something that cannot be changed
to continue hoping even when it seems impossible