What does "in about forty-five minutes" mean in English for Spanish?

In English for Spanish, "in about forty-five minutes" means:

en unos 45 minutos

Listen to "in about forty-five minutes": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 4, Level 1, Scene 1