心灵是一个操作符号表征的信息处理系统。
市场是一位伟大的老师，但它收取高昂的学费。
在没有生命力的帮助下合成尿素是一个极其重要的事实。
I don't know what I would do if I didn't act. I think I would go mad.
The only way to keep improving is to keep pushing yourself.
人生是由小小的幸福积累而成的。