Usages of el retraso
Tenemos un retraso por el clima.
We have a delay because of the weather.
Estamos aburridos por el retraso.
We are bored because of the delay.
El tren tiene un retraso, por eso te aviso.
The train has a delay, that's why I notify you.
Elon.io is an online learning platform
We have an entire course teaching Spanish (Latin America) grammar and vocabulary.