unfortunately中等

Unfortunately, the polyurethane foam he used is inherently unstable.

不幸的是，他使用的聚氨酯泡沫本身就不稳定。

Unfortunately, many people who are opting to work in retirement are preparing to do so because they are worried about making ends meet in their later years, said Brent Weiss, a co-founder at Baltimore-based financial-planning firm Facet Wealth.

总部位于巴尔的摩的理财规划公司Facet Wealth的联合创始人布伦特·韦斯说，不幸的是，许多选择在退休后工作的人之所以准备这样做，是因为他们担心晚年难以维持生计。

Unfortunately, the long-term costs of using simple quantitative metrics to assess researcher merit are likely to be quite great.

不幸的是，用简单的量化指标来评估研究人员价值的长期代价可能相当大。

Unfortunately, life is not a bed of roses.

遗憾的是，生活并非一帆风顺。

Unfortunately, people create inner barriers with a help of exaggerating fears.

遗憾的是，人们会借助夸大的恐惧为自己制造内心障碍。

Unfortunately, despite 2½ years in the making, “The Heart of the Matter” never gets to the heart of the matter: the illiberal nature of liberal education at our leading colleges and universities.

遗憾的是，尽管历时两年半才完成，《问题的核心》却始终没有触及问题的核心：我国一流高校中博雅教育的“不博雅”本质。