difficult problem英语标准发音：difficult problem英式发音：美式发音：翻译中文难题difficult problem - 基本释义[词典1]难题difficult problem - WEB词典difficult problem困难的问题疑难问题a difficult technical problem一个难题difficult point problem难点问题 参考资料： 1.百度翻译：difficult problem2.有道词典：difficult problem3.爱词霸：difficult problem
