Certainty is the state of being definite or of having no doubts at all about something. 确定
noun [专属名词] 确实，确定性；确实的事，必然的事
Such attitudes are valueless unless they reflect inner cognition and certainty. 这种态度如果不能反映内心的认知和确定性就毫无价值。
- certainty 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 43 Are there strangers in space?
