研究“四个如何认识”，也就是研究当代世界和当代中国。
Studying Four How to Understand is studying world and China of our time too.
本文试图回答四个问题：1 .应该如何理解实践是检验认识真理性的唯一标准？
In this thesis, the author will try to answer four questions as follows: 1. How should we understand that only practice can be the criterion of truth?
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