The thesis proposed in Brentano's Psychology from an Empirical Standpoint (1874) that it is the intentionality or directedness of mental states that marks off the mental from the physical.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。