追求权力是所有大国的主要目标，这种追求常常导致冲突。
The pursuit of power is the primary goal of all great powers, and this pursuit often leads to conflict.
I always tell my students that it's okay to make mistakes, as long as you learn from them.
最好的想法往往来自最意想不到的地方。
"The world is a book, and those who do not travel read only one page."