求翻译：有关文化负载词翻译技巧的研究已有许多文章发表+其中提出的翻译技巧总结起来有.直译法、增词法、转换法和意译法+或概括为异化法和同化法。然而+文化负载词在翻译时究竟依据什么选择翻译技巧，却还没有一个指导性的原则。是什么意思？

Research on translation of culture-loaded words skills has published many articles + translation skills summary together with the question of which. literal translation and lexical, conversion and free translation law increasing by + or summarized as alienation and assimilation by law. + Culture-loaded words in translation, however what exactly the basis when selecting translation skills, but also the absence of a guiding principle.