我和諾特曼討論了這個(gè)想法的可行性。Knotman and I discussed the practicability of the idea.他們的國防市場太小，就經(jīng)濟(jì)可行性而言不足以維持生產(chǎn)。Their defense markets are too small to sustain economically viable production runs.關(guān)于該病例做手術(shù)的可行性，我持有疑問。I have doubts about ...