/nəʊ; no/
neg det
1 (used with pl [C] ns, sing [C] ns or [U] ns 与可数名词的单数、复数或不可数名词连用) not any; not one; not a 没有; 无
*No words can express my grief. 我的忧伤无法用语言表达.
* No student is to leave the room. 学生不得离开这个房间.
* I have no time at all to write to you. 我根本没时间给你写信.
* No two people think alike. 没有两个人的想法是一样的.
2 (used to indicate that sth is not allowed 用以表示某事被禁止)
*No smoking. 禁止吸烟.
* No dogs in the restaurant. 不得携狗进入饭店.
3 (used to express the exact opposite of what is said 用以表示与所说的事截然相反)
*It was no easy part to play, ie It was very difficult. 那可不容易.
* She was wearing no ordinary hat, ie Her hat was very unusual. 她戴的那顶帽子可不一般.
* She's no fool, ie She is intelligent. 她可不是傻子.

interj (used to give a negative reply 用作否定的答覆)
*`Is it raining?' `No, it isn't.' ｀现在下雨吗?＇｀没下.＇
* `Haven't you finished?' `No, not yet.' ｀你做完了吗?＇｀还没有.＇
* `Are you still a student?' `No, I've got a job now.' ｀你还是学生吗?＇｀不是, 我现已经工作了.＇

No.
alsono.pluralNos
[Date: 1600-1700; Language: Latin;Origin: numero 'in number']
the written abbreviation of number
　Mozart's piano concerto no. 27