人は、失敗から学び、成長する。
对于系统,翻版的模拟是在控制图中添加一个创建循环的边,而不仅仅是一个附加节点。
A company’s true strength is measured by how it adapts to change, not just by its past achievements.
A well-designed system should be easy to use, easy to understand, and easy to modify.