substituiran

In a sentence

• Els estudiants substituiran els llibres vells per nous.

  The students will replace the old books with new ones.

  In this sentence, 'substituiran' indicates the action of replacing or exchanging one item for another.

• Les noves tecnologies substituiran les antigues.

  New technologies will replace the old ones.

  Here, 'substituiran' expresses the concept of substitution, where new elements take the place of older ones.

• Els jugadors lesionats els substituiran altres membres de l'equip.

  The injured players will be substituted by other team members.

  This usage shows 'substituiran' as referring to someone taking the place of others temporarily or permanently.