doubtful about英语标准发音：doubtful about英式发音：美式发音：翻译中文怀疑doubtful about - 基本释义[词典1]怀疑doubtful about - WEB词典doubtful about怀疑的对……怀疑对…怀doubtful of about怀疑doubtful view about ancient history疑古史观 参考资料： 1.百度翻译：doubtful about2.有道词典：doubtful about3.爱词霸：doubtful about
