Some electronic dictionaries have their own format and need to use special browsers. Extracting parallel sentences from these dictionary is very hard. However, ``Random House[13]'', a very well known English dictionary, is suitable for this task. Because the format of this dictionary has already been well known in detail.
``ビジネス技術実用英語大辞典[14]'' also has many parallel sentences, so we surveyed this format and extracted parallel sentences from it.
However the survey of all this kinds of dictionaries is difficult. So, we did not used any more this kind of these dictionaries.