Usages of la mancha
No he visto la mancha roja.
I have not seen the red stain.
Alguien ha abierto la puerta y ha pisado la mancha.
Someone has opened the door and has stepped on the stain.
Ojalá pudiera deshacer el error y borrar la mancha.
If only I could undo the mistake and erase the stain.
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