The way to learn about the mind is to reverse-engineer it: to figure out what natural selection designed it to accomplish.
The best way to learn a new programming language is by writing programs in it.
石油的真正成本不仅仅是每桶的价格,还包括环境和社会影响。
移民的影响往往是局部的,并且与具体背景相关。
You have to believe in yourself when no one else does.