Translation of "Ephemeral" in Spanish

It's the ephemeral megacity.

Es una megaciudad efímera.

The trouble with newspapers is that they're ephemeral.

El problema con los periódicos es que son efímeros;

But a city that's a temporary megacity, an ephemeral megacity.

Pero es una megaciudad, transitoria, efímera.

- No dream lasts a lifetime.
- No dream lasts forever.
- All dreams are temporary.
- All dreams are ephemeral.
- All dreams don't last long.

Todos los sueños son efímeros.

There are two worlds: one immediately perceptible to the senses, world of appearances, ephemeral shadow of a more concealed one, accessible only through the reason; this is the true and eternal world.

Existen dos mundos: uno perceptible inmediatamente a los sentidos, mundo de apariencias, sombra efímera de otro más escondido, accesible solo a la razón; este es el mundo real y eterno.