NA：天然琥珀

“Natural Amber”在学术与科研领域，特别是在地质学相关研究中，常被简写为“NA”以便于快速书写和引用。其对应的中文含义是“天然琥珀”，是一种由古代树脂经长期地质作用形成的有机宝石。

Three Dimensional Fluorescence Spectra Representation of Natural and Treated Amber
天然与人工处理琥珀的三维荧光光谱表征
The three dimensional fluorescence spectrum lends itself to representing carbon functional groups enveloping each other in heat-filling treated amber, and it has an important representative significance for identifying the natural and heat-filling treated amber and artificially resin.
三维荧光光谱有助于表征热填充处理琥珀中相互包络的碳官能团，它对天然与热填充处理琥珀及人工树脂的鉴别具有重要的标型意义。
Succinic acid, an ubiquitous natural activity, is an important content in amber which is a traditional antiepileptic drug.
琥珀酸是传统经典抗癫痫中药琥珀的主要成分，是普遍存在于自然界的一种天然活性物质。
But there is doubt of violation in the operational sections of direct subside in America's disaster relief. Therefore, China should oppugn the subside methods of natural disaster relief in America, cast about for containing these subsidies in " Amber Box Policies ";
但是，美国灾害救济中的直接补贴操作环节存在违规嫌疑，因此，要质疑美国的自然灾害救济补贴做法，力主将此类补贴纳入黄箱补贴范畴；

本站英语缩略词为个人收集整理，可供非商业用途的复制、使用及分享，但严禁任何形式的采集或批量盗用

若NA词条信息存在错误、不当之处或涉及侵权，请及时联系我们处理：675289112@qq.com。