Tambien en ingles podemos decir : I was the director in/at.... I used to be a receptionist.... I have been unemployed...... "Estar de" se utilisa en muchas frases. En ese contexto, "estuve de secretaria" significa "I was a secretary". Tmabien podemos decir "Estuve de viaje" (I was travelling)... "estuve de acuerdo" ( I agreed).

this research has developed in the area of Campo Verde, an area of three hectares, the Qqueue family. the overall objective was expecting technology of rice production in soils with a history of having been a swamp, through an irrigation system evaluation components which would be three levels of nitrogen..ayudame a traducir esto por favor