. "Cómo podemos utilizar la polea?"@en . "Cómo podemos utilizar la polea?" . . . . . . . . . "Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work."@en . "Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work." . . "Juvenile works"@en . "Juvenile works" . . .