The man who speaks to you of sacrifice, speaks of slaves and masters. And intends to be the master.

Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude.

自然实验可以为经济问题提供有价值的见解。

医学的未来在于理解疾病的分子基础。

Sustainability is not an option; it's a necessity for any business that wants to thrive in the long term.

教育的根是苦的，但其果实是甜的。