the state of being unsure of something
同义词：doubt??/??uncertainty??/??incertitude??/??dubiety??/??doubtfulness
uncertainty about the truth or factuality of existence of something
同义词：doubt??/??doubtfulness??/??question
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。