to fulfill one's obligation, especially in a difficult situation
履行某人的义务，尤其是在困难情况下 (lvxing mouren de yiwu, youqi zai kunnan qingkuang xia)
"Firefighters answered the call of duty during the massive fire."
"消防员在大火中履行了他们的职责。" (xiaofangyuan zai dahuo zhong lvxing le tamen de zhize)
to be cheerful and confident
to take strong action to stop something
when performers return to the stage to receive applause
to send too many messages or unnecessary information
to begin to take effect
to start being creative or imaginative
