Topology is the study of the properties of a figure that are unchanged by any deformation.
对认可的渴望,灵魂中的激情部分,是人性中最具政治危险性的部分。
The hours of folly are measured by the clock, but of wisdom: no clock can measure.
The harmony between humans and nature is the ultimate goal.
Success is not the key to happiness. Happiness is the key to success.