An user Spanish
says…

Los
Determiner
  cultivos
Noun
  virales
Adjective
  son
Auxiliary
  muy
Adverb
  costosos
Adjective
  y
Coordinating conjunction
  solo
Adverb
  se
Pronoun
  realizan
Verb
  en
Adposition
  pocos
Determiner
  laboratorios
Noun
.

Viral cultures are very expensive and are only done in a few laboratories.
Words and sentences
New
los

New
cultivos

plural of cultivo

New
son

New
muy

very

New
costosos

masculine plural of costoso

New
solo

New
en

  1. in, at, on
  2. in (a time)
  3. in (a language)
  4. used after some verbs and translated by various prepositions in English
  5. in (in various expressions)

New
laboratorios

plural of laboratorio

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