The beauty of instrumental variables is that they allow us to see the world in a new light.
工具变量的美妙之处在于它们让我们以新的视角看世界。
"A library is a place where the past meets the present and the future."
Every role I take is a part of me, and I give a part of me to every role.
道,真实可信,无为且没有形相,可以流传而不可以传授,可以得到却不能够看见;自己便是本根,没有天地之前就已经存在;鬼神天帝因它而化,天地因它而生;在太极之上而不为高,在六合之下而不为深,生在天地之先而不为亘久,长于上古之时却不为老。
永远不要把后天能做的事推迟到明天。
Moving to the cloud is not an option for enterprises, but a must.