tighten
- vt. 变紧；使变紧
- vi. 绷紧；变紧
考试真题
- They had to tighten their belts.
出自-2012年12月阅读原文
- Health and environmental advocates have long urged U.S.government agencies to tighten the use of some of the 11 chemicals the report cites and called for more studies on their long-term effects.
2015年12月六级真题（第一套）阅读 Section A
- You can expect that noose (束缚) to continue to tighten.
2017年12月六级真题（第三套）阅读 Section B
- Nations would not need to tighten their emissions targets.
2016年高考英语上海卷 阅读理解 阅读B 选项
- Now, several states are moving to tighten laws by adding new regulations for opting out.
2017年高考英语北京卷 阅读理解 阅读C 原文
- To meet this minimum goal, the agreement requires countries to tighten emissions targets every five years.
2016年高考英语上海卷 阅读理解 阅读B 原文