- tighten
 - ['taitən]
 - vt. 变紧;使变紧
vi. 绷紧;变紧 
参考例子
           - 1.muscles tightening with fatigue
 - 因劳累而变得发紧的肌肉
 
- 2.I have to tighten my belt this month.
 - 这个月我要勒紧裤腰带过日子了。
 
- 3.She suddenly felt her heart tighten, and began to cry, there were tears of joy and of satisfaction.
 - 她忽然觉得心头一紧,不知怎么的就哭了起来,那是快乐的泪水,满足的泪水。
 
英文解释
           - v.
 - 1.make tight or tighter
 - 2.become tight or tighter
 - 3.restrict
 - 4.narrow or limit
 
网络释义
               - tighten
 - 束紧; 变紧; 扣紧、变紧; 拉紧;
 
- tighten formation
 - 收缩队形;
 
- to tighten
 - 紧缩银根;
 
- tighten auditing
 - 强化审计;
 
- tighten macro
 - 加大宏观调控力度;