学习如何生活，而不是如何生存。
It is better for you to be free of fear lying upon a pallet, than to have a golden couch and a rich table and be full of trouble.
The future of medicine lies in understanding life at its most fundamental level.
Words are like keys. If you choose the right ones, they can open any door.
指事物之间相互依存、相互制约的关系。