minas

In a sentence

• Las minas de carbón son esenciales para la economía local.

  The coal mines are essential for the local economy.

  Here, 'minas' refers to mines, specifically places where minerals, coal, or other valuable substances are extracted from the ground.

• Las niñas jugaron a ser piratas buscando minas llenas de tesoros.

  The girls played at being pirates searching for treasure-filled mines.

  In this context, 'minas' still refers to mines, though in a more fictional, treasure-hunting story context rather than a literal industrial one.

• En algunos países, todavía hay minas terrestres que representan un peligro.

  In some countries, there are still landmines that pose a danger.

  Here, 'minas' is short for 'minas terrestres', meaning landmines, which are explosives placed on or just under the ground.