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"Unos" is a form of "un", an indefinite article which is often translated as "a". "Una" is a noun which is often translated as "one". Learn more about the difference between "una" and "unos" below.
la una()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
1. (time)
un()
An indefinite article is a word that indicates that a noun is not specific (e.g., a girl).
1. (singular)
b. an (before vowel sound)
Tienen una vieja cámara que todavía funciona.They have an old camera which is still working.
