不同民族之间的文化差异并非源于民族本身的生理特征差异,而是源于其历史发展的差异。
A vida é uma coisa muito rara.
The architect must be a master of light and shadow.
The existence of a legal system is a matter of fact, not of morality.
Sustainability is not a choice anymore; it's a necessity for survival in today's world.