Brain drain, which is the action of having highly skilled and educated people leaving their country to work abroad, has become one of the developing countries concern. Brain drain is also referred to as human capital flight. More and more third world science and technology educated people are heading for more prosperous countries seeking higher wages and better working conditions. This has of course serious consequences on the sending countries like Brazil. 

While many people believe that immigration is a personal choice that must be understood and respected, others look at the phenomenon from a different perspective. What makes those educated people leave their countries should be seriously considered and a distinction between push and pull factors must be made. The push factors include low wages and lack of satisfactory working and living conditions. Social unrest, political conflicts and wars may also be determining causes. The pull factors, however, include intellectual freedom and substantial funds for research. 

Fonte: Available:< http://www.myenglishpages.com/site_php_files/vocabulary-lesson-brain-drain. Access: 17 nov. 2014. (slightly adapted). Based on the text, explain in Portuguese the meaning of the expression “brain drain”. 

Based on the text, explain in Portuguese the meaning of the expression “brain drain”.