The document discusses various issues relating to the concept of equivalence in translation. It addresses: 1) Definitions of equivalence, including being equal, comparable, or having the same meaning or function. 2) The relationship between the source text and target text, and how to define and measure their level of equivalence. 3) Theories of equivalence from scholars like Roman Jakobson, Vladimir Nabokov, and Eugene Nida that focus on different types and levels of equivalence.