“ One day“ refers to time. In translation, the category word "时间" should be added to make the sentence fluent and specific.This is because the translator is familiar with the cognitive patterns, aesthetic habits and reading expectations of the target language readers, prompting the translator to form a translator's habit of taking full account of the reader's receptivity.cognitive patterns, aesthetic habits and reading expectations of the target language readers, prompting the translator to form the translator's habit of fully considering the readers' acceptability,and make the target language more pleasant to the audience