条件作用原理同样适用于所有物种。
Dairy farming is not just a business; it's a way of life that we must protect and nurture.
创造力的主要敌人是"良好"的判断。
To travel is to discover that everyone is wrong about other countries.
勇气是所有美德中最重要的,因为没有勇气,你就无法始终如一地实践其他美德。