| 单词 | tighten up |
| 释义 | tighten upphrasal verb tightened up; tightening up; tightens up : to become more strict or effective or to make (something) more strict or effective Security around the building has tightened up recently. They tightened up security around the building. |
| 随便看 |
英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。