自由贸易是国家繁荣的关键。
La literatura nos permite viajar a otros mundos sin movernos de nuestro lugar.
Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work.
When we understand knowledge-based systems, it will be as before -- except our fingertips will have been singed.
语言是心灵的声音，而沉默是它的回响。