要理解行为，我们必须从生存和适应的背景中审视其目的。
To understand behavior, we must look at its purpose in the context of survival and adaptation.
美联储拥有的最强大工具是沟通的力量。
I'm a work in progress, and I'm okay with that.
到了白头之年，我们同甘共苦；历史的是非功过，又由谁来评定呢？
The waterfall sing， I find my song， when I find my freedom。