劳动力市场并非存在于真空中;它是由文化、政策和历史塑造的。
控制的目的是使系统在存在不确定性和干扰的情况下仍能按期望的方式运行。
I'm not trying to be perfect, I'm just trying to be better
And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'