no·tion·al
adjective/ˈnəʊʃənl/
/ˈnəʊʃənl/
(formal)- based on a guess, estimate or theory; not existing in reality
猜测的；估计的；理论上的；想象的 - My calculation is based on notional figures, since the actual figures are not yet available.
我是按估计的数字计算的，因为还没有实际数字。
Word Originlate Middle English (in the Latin sense): from obsolete French, or from medieval Latin notionalis ‘relating to an idea’, from notio(n-) ‘idea’, from notus ‘known’, past participle of noscere. - My calculation is based on notional figures, since the actual figures are not yet available.