The ring opening polymerization of aminoacid N-carboxyanhydrides ( NCAs) was applied to the synthesis of cylindrical polypeptide brushes by using the " grafting from" technique.

本文通过“胺”引发氨基酸酸酐开环聚合机理及“表面接枝”路线合成柱状多肽分子刷。

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This paper presents details of the electric principle and method of design of an N-stage adaptive reversible ring circuit.

本文介绍一种N级适应式可逆环形电路的原理和设计方法。

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The girl did not want to be a(n) burden to him, she wrote to him saying that she did not wish to wait any longer, with the letter, she sent the ring back to him.

女孩不想成为男孩的负担，于是，她写信告诉他，她不想再这样无休止的等待。在信中，她还带去了她的订婚戒指。

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That's why in the earlier models of the atom, they're not horrible to sometimes think about just each n value as a little ring around.

这就是为什么在早期原子模型中，人们没有感觉到把每一个，n，都想象成,一个绕核的小圆圈有什么不妥。

麻省理工公开课 - 化学原理课程节选

To make a gadget called the Can Pump N' Pour, a circular hard plastic ring with a rubber cover that keeps the fizz in opened soda cans, Davison engineers went through 30 different versions with its own moldmaking machines before getting the shape right.

FORBES: Inside InventionLand

The same company that brought us the original locoGPS is back at it again, this time with a wireless module that looks fit 'n trim enough to stow away neatly on a key ring.

ENGADGET: locoGPS, now in WiFi flavor Mobile

Looking for further hints about what this three-ring aid circus might entail, I pulled up the Web site on Tuesday of the U.N.

FORBES: Freedom's Edge