to stay informed or at the same level as something or someone
mantenerse informado o al mismo nivel que algo o alguien (mantenerse informado o al mismo nivel que algo o alguien)
"It's hard to keep up with the latest tech trends."
"Es difícil mantenerse al día con las últimas tendencias tecnológicas." (Es difícil **mantenerse al día** con las últimas tendencias tecnológicas.)
to have a big, broad smile showing happiness
used to introduce an opinion that may or may not be useful
to make someone take responsibility for their actions
to try to get something such as information or praise
people with similar interests or characteristics
to try something without knowing the result