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A masculine noun is used with masculine articles and adjectives (e.g. el hombre guapo, el sol amarillo).
En algunos procesos industriales, el metal sirve de catalizador para acelerar el proceso y ahorrar energía.In some industrial processes, metal acts as a catalyst to speed up the process and save energy.
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An adjective is a word that describes a noun (e.g. the big dog).
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
no direct translation
el principio catalizador del cambiothe catalyst of change
A noun is a word referring to a person, animal, place, thing, feeling or idea (e.g. man, dog, house).
a. catalytic converter
Collins Complete Spanish Electronic Dictionary © HarperCollins Publishers 2011
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