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。
The only way to do great work is to love what you do.
你不需要离开你的房间。继续坐在桌边倾听。甚至不需要倾听,只需等待。甚至不需要等待,只需保持安静和孤独。世界会自由地向你展示其真实面目,它别无选择,会在狂喜中翻滚在你脚下。
The true measure of success in forestry is leaving the land healthier than we found it.
The beauty of science lies in its ability to explain the natural world through observation and experimentation.