[誤] Ida misspells the word "pronunciation", however, it is only a mistake of pen.
[正] Ida misspells the word "pronunciation", however, it is only a slip of the pen.
注:與 mistake(錯誤,誤會,過失)相比,slip 更側(cè)重于由于不經(jīng)意或疏忽而造成的錯誤,所以“口誤”一般譯為 a slip of the tongue,同樣,“筆誤”就翻譯成 a slip of the pen。