Translation of "Mantenerla" in English

Una vez que hayas hecho una promesa, debes mantenerla.

Once you have made a promise, you should keep it.

Pero antes, debemos ocuparnos de la medicina y ver cómo mantenerla fresca.

But before we do that we need to sort out these medicines and do something that's gonna keep those cool,

Eso no es bueno para la medicina. Necesitaremos un plan para mantenerla fresca.

That's not gonna be so good for the medicine. We'd need another plan for that, to keep that cool.

Eso no es bueno para la medicina. Necesitaremos un plan para mantenerla fresca. 

It's gonna be so good for the medicine. We'd need another plan for that, to keep that cool.

- ¿Este muro se construyó para mantener a la gente fuera o para mantenerla dentro?
- ¿Este muro se construyó para mantener a la gente afuera o adentro?

Was this wall built to keep people out or to keep them in?