过去是一个萦绕现在的幽灵，无论我们是否承认。
The market is a reflection of the balance between supply and demand.
疼痛研究不仅仅是缓解痛苦；它关乎理解人类生物学的一个基本方面。
The true value of a forest isn't measured in board feet, but in biodiversity and carbon sequestration.
The state is the most important institution in human society, and its strength or weakness is the key determinant of a society's success or failure.
You may think using Google’s great, but I still think it’s terrible.
I am interested in the transformation of substances.