Labor (2) Physics (2) Nature (2) Matter (2) Light (2) Luz (2) Naturaleza (2) Materia (2) Física (2) Trabajo (2) génération (2) matière (2) Tongue (1) Senses and sensation (1) Research (1) Literature (1) Concepts (1) Causation (1) Tesis (1) Lengua (1) Conceptos (1) Literatura (1) Causalidad (1) Sentidos (1) Investigación (1) causalité (1)