白兔糖vov
其英文单词是：optimism and Pessimism
常见例句如下： The balance between optimism and pessimism is also always affected by personal circumstances, as much as rational analysis.
乐观与悲观之间的天平总是既受到个人环境的影响，也受到理性分析的影响。
During the process of the development of futurology, the debate between optimism and pessimism results in the emergence of sustained development strategy.
在未来学的发展过程中，乐观与悲观两派的论争，导致了可持续发展战略的产生。
Optimism and pessimism mingle queerly in American writing.
乐观和悲观可以在美国作品里奇妙地结合起来。
