你永远不会太老去设定另一个目标或梦想一个新的梦想。
You are never too old to set another goal or to dream a new dream.
文化生态学的研究需要一种整体方法,考虑影响社会的自然和文化因素。
学习的最佳方式是教授。
All behavior is motivated by some form of drive reduction.