轧棉机的发明是一系列无法预见的 circumstances 的结果。
提高就是要改变,而要达到完美就要不断改变。
心理过程的功能是调解有机体的需求与环境的要求。
为了成功,你必须愿意失败。
People can be really smart or have skills that are directly applicable, but if they don't really believe in it, then they are not going to really work hard.