意识到社会结构的概念并敏感地使用它，就是能够在各种环境中追踪这种联系。
To be aware of the idea of social structure and to use it with sensibility is to be capable of tracing such linkages among a great variety of milieux.
食品安全方面的创新不是可选项，而是我们对消费者的道德义务。
The most exciting breakthroughs of the 21st century will not occur because of technology but because of an expanding concept of what it means to be human.