Language is the key to understanding higher mental processes.
语言是理解高级心理过程的关键。
我对蛋糕的政策是支持拥有它并支持吃掉它。
The only real failure in life is not to be true to the best one knows.
The environment shapes behavior, but behavior also shapes the environment.
这个世界是个美丽的地方，值得为之奋斗。