NRA

This paper describes the recent progress in the nuclear analysis techniques based on small accelerator ( PIXE, RBS, NRA, AMS etc.), as well as in the nuclear technique of medical imaging(γ camera, SPECT, PET, NMRI etc).

本文阐述了近十多年来基于小加速器的核分析技术（PIXE、RBS、NRA、AMS等）以及医学显像核技术（γ照相、SPECT、PET、NMRI等）的研究进展。

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And have prepared crystal nano-silicon particles with the diameter ranging from 30 to 50 nra.

利用该设备制备了直径30～50nm的晶态纳米硅颗粒.

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But the gun manufacturers and the NRA would be up in arms if you tried something like that.

但是，如果你们试图做那样的事情，枪支生产者和全国枪支协会将会揭竿而起。

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Analysis of NRA and Chlorophyll Dynamic Content in Low-protein Variant Lines of Wheat Transferal with Soybean DNA by Ion Beam

离子束介导的小麦低蛋白变异株系NRA、叶绿素含量动态分析

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The NRA had a great night.

全国步枪协会那天晚上获得了大丰收.

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A two years study indicated that nitrate reductase activity ( NRA ) in vivo sharply decreased after harvest.

两年的试验结果表明,深色晾烟采收晾制后,体内硝酸还原 酶 活性剧烈下降.

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On cue, the NRA accused Mr Obama of an assault on American liberty.

就在这时，nra指责奥巴马侵犯美国人的自由。

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The performance of Nitrate Reductase Activity ( NRA ) in plant leaf reflects the status of nitrogen metabolism.

硝酸还原 酶 活性高低可反映植株营养状况和氮素代谢水平.

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The results indicated PDJ could improve the vigor of root system and NRA of leaves, increase chlorophyll and soluble protein content, thus laying a better physiological foundation for high yield.

结果表明，二氢茉莉酸丙酯提高了根系活力和叶片硝酸还原酶活性（NRA），增加叶绿素含量和可溶性蛋白含量，从而为高产奠定了良好的生理基础。

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