In this task, you are given a sentence in Spanish and your task is to translate it into English. In translation, keep the numbers and capitalization (capitalize only the first word of each sentence and name).

La experiencia demuestra que los proyectos de cooperación han de ser mejor planificados, que el seguimiento de los mismos debe ser más preciso y que es necesario que comporten un rendimiento mayor.
Experience shows that projects of cooperation need better planning and closer monitoring and need to be generally more successful.

Pero, ¿qué hemos visto desde entonces?
But what have we seen since then?

Es algo que deberíamos evitar.

That is something we must guard against.