如果一切都很完美,你就永远无法学习和成长。
If everything was perfect, you would never learn and you would never grow.
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。
永不言弃。
"Stories are the way we pass on our humanity."
The division of labour, so far as it can be introduced, occasions, in every art, a proportionable increase of the productive powers of labour.