noise and number index
noun
A quantity used in evaluating aircraft noise in terms of its intensity and frequency of occurrence; abbreviated NNI.
Origin
1960s.
| 单词 | noise and number index |
| 释义 | noise and number indexnoun A quantity used in evaluating aircraft noise in terms of its intensity and frequency of occurrence; abbreviated NNI. Origin |
| 随便看 |
英语词典包含243303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。