Learning is the process of modifying symbolic structures to improve performance.
The laws of behavior can be derived from basic physiological principles.
The true essence of scientific discovery is not in the answers it provides, but in the new questions it raises.
The environment is a long-term issue that requires long-term commitment.
代数是人类创造的一种智力工具,用于清晰地表达世界的数量关系。
The world changes by your example, not by your opinion.