翻译一般是寻求原文和译文在意义上的对等,翻译的对等单位应该建立在语篇上。译者要做到最大限度的等值翻译,就要进行句界调整。句界调整时恰当地选择主位和述位,可以有效地改善译文质量,译文更符合目的语表达习惯。 Translation generally seeks to find the meaning of the original and the translation of the equivalent, the translation of the equivalent units should be established in the discourse. To achieve the maximum equivalent translation, the translator needs to make adjustments to the sentence boundary. The choice of thematic and rheme during the sentence boundary adjustment can effectively improve the quality of the translation, and the translation more conforms to the expression of the target language.