very tough and determined
muy dura y decidida (mui dura i desidida)
"She’s hard as nails when it comes to achieving her goals."
"Ella es muy dura y decidida cuando se trata de alcanzar sus metas." (eia es mui dura i desidida cuando se trata de alcanzar sus metas)
to cause pollution or environmental impact through daily act...
too difficult to understand
to be the first to report an important piece of news
to inhale air deeply
doing something unusual or original
to begin to improve after a difficult period