Not Nai
不───no;奈───Nai
The house she has just bought is no class.───她刚买的房子是低劣品.
The road is no good ; it's rough and full of holes.───这条路坑坑洼洼的,太差劲了.
No, no, no," Morris said crossly.───不，不，不，”莫里斯愤怒地说。
There is no story without coincidences.───无巧不成书.
As the jewel was in the rough state , he had no idea what size it would be when cut.───这块宝石未经琢磨, 他不知道加工后有多大.
They gave me much abuse for no fault.───他们无缘无故地大骂我.
No mathematician is infallible; he may make mistakes, but he must not hedge.───没有一位数学家是一贯正确的; 他可能会犯错误, 但他绝不会回避任何一个问题.
It's a pity the room has no north window and you don't get a draught.───可惜这房间没北窗,没有过堂风.
There is no end to learning.
True coral needs no painter's brush.
A clean hand wants no washing.
No, thank you. I've had enough.
I had no choice in the matter.