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基本释义:
abbr.National Register of Archives <英>国家档案登记处
实用例句
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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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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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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英英释义
Noun1. a powerful lobby that advocates the right to own and bear arms and rejects any gun regulation by the government
