to be working or responsible for something at a certain time
быть на службе или нести ответственность за что-то в определённое время (byt na sluzhbe ili nesti otvetstvennost za chto-to v opredelennoe vremya)
"The guard was on duty all night."
"Охранник был на дежурстве всю ночь." (okhrannik byl na dezhurstve vsyu noch)
to start broadcasting in real time on social media
to make a very serious promise that something is true
an older person who uses the internet regularly
to divide something into parts
to describe exactly what is causing a situation or problem
to join others in doing a task or helping
