马的喘息症难治.Heaves is difficult to cure.我得了很难治的感冒,日夜咳嗽.I had a stubborn cold and coughed day and night.反流可引起复发的难治的吸入性肺炎.Reflux leads to recurrent or refractory aspiration pneumonia....

“难治”的英语可以翻译为：[医] refractoriness ...