This problem of what is destiny is very difficult and complex.
Managing people is more difficult and complex than we thought.
Defining the new legislative system is a difficult and complex issue.
A short article that tries to answer this difficult and complex question.
This is an irreversible process that requires difficult and complex solutions.
It is fair to recognise that these issues are extremely difficult and complex.
Another example that was even more difficult and complex was transport.
Otro ejemplo aún más difícil y complejo era el del transporte.
All this adds up to a very difficult and complex situation.
Todo esto se suma a una situación muy difícil y compleja.
The doctor said that it's a difficult and complex procedure.
Sabes que el doctor dijo que es un procedimiento difícil y complejo.
We are going through a difficult and complex period in our country.
Actualmente, estamos viviendo un difícil y complejo periodo en nuestro país.
The structural design for this project is very difficult and complex.
El diseño estructural de este proyecto es muy difícil y complejo.
We are, of course, living in a difficult and complex world.
Desde luego, vivimos en un mundo difícil y complejo.
But the piano is a difficult and complex instrument for the whole brain.
Pero el piano es un instrumento difícil y complejo para todo el cerebro.