关系模型基于谓词逻辑和集合论，为数据库管理提供了坚实的数学基础。
Gentlemen,what are the Four pillars?Tradition,Honour,Discipline,Excellence.
There's a real correlation between a society that tells people that they can do anything, and the existence of low self-esteem. So that's another way in which something quite positive can have a nasty kickback. There is another reason why we might be feeling more anxious --about our careers, about our status in the world today, than ever before. And it's, again, linked to something nice. And that nice thing is called meritocracy.
建筑师必须是一个工匠。