您要找的是不是：
pron. 没有人；一个也没有；没有任何东西 |...
n. 九，九个 | num. 九；九个 | adj. 九...
N,N-Dibutylformamide ; formamide, n,n-dibutyl
Mister Ban, Secretary of State Hillary Clinton and Haitian President Rene Preval led a conference of donors at the U.N.Wednesday.
VOA : special.2010.04.02
So, from going from the shell of n equals 2, let's say, to the shell of n equals 3.
比如说，从ｎ等于２到ｎ,等于３壳层如何变化。
化学原理课程节选 : 麻省理工公开课
STUDENT: PROFESSOR: Oh, I'm sorry. So it's n minus l minus 1.
学生：,教授：不好意思，这是ｎ减去ｌ减去１．
Five days of talks recently took place in Rome at the headquarters of the U.N.Food and Agriculture Organization.
VOA : special.2009.02.10
The Global Nomads Group,or G.N.G., was started in nineteen ninety-eight by four university students.
VOA : special.2009.11.12
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。