41. Internals were believed by Rotter ( 1966 ) to exhibit two essential characteristics : high achievement motivation and low outer-directedness. 42. It is this penetration of various influences and personal experiences which is the essential characteristic of the work of Legrand. 43. In both cases, however, the essential characteristics were the same, but with emphasis placed on different elements of the condition. 44. This transition to creativity, moreover, is often viewed as an essential characteristic setting fully modern Homo sapiens apart from their ancestors. 45. Democritus ( 460 BC ) thought that the essential characteristic of life is having a soul ( " psyche " ). 46. The ability to evade enemy radar " is an essential characteristic of military aircraft, ships and missiles, " the complaint said. 47. Only the notion of one preferential striking platform is the most essential characteristic of the true " Levallois " reduction strategy. 48. Rock placement is a general " aim to portray nature in its essential characteristics "-the essential goal of all Japanese gardens. 49. He wrote that it was an " essential characteristic " of dolls and many other toys that they represent something else. 50. Yet she too undergoes a transformation, and what Ms . Comeaux's portrayal showed was the dignity that is her most essential characteristic .