人类可以认识世界，人类对世界的认识是以实践为中介，通过思维和语言来实现的。
Humankind always learns about the world. His understanding must be based on human practice and can be achieved through human thought and language.
用户场所访问使你能够对真实的世界以及使你的最终用户的工作实践有一个清晰的认识。
Site visits give you a clear insight into the real world, and working practice of your end users.
知识是人们在长期的生活及社会实践中、科学研究及实验中积累起来的对客观世界的认识与经验。
Knowledge is the cognition and experience of the external world. It is accumulated by a long life of people and the social practice, also by scientific researches and experiment.
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