The only glimmer of hope was the outcome of experiments being made in England and the US to mate the Rolls-Royce Merlin engine to the airframe of the North American Aviation (NAA) P-51.
现在，最后一丝希望寄托在英国和美国同时进行的一项实验结果上，那就是为北美航空公司(NAA)设计的P - 51战斗机装上劳斯莱斯公司设计的“灰背隼”引擎。
The NAA treatment increased adzuki bean's plant high, the leaf area and the branching number, it reduced the main stalk pitch number slightly, its influence to the stem thick was not obvious too.
萘乙酸增加了红小豆的株高、叶面积和分枝数，略微降低了主茎节数，对茎粗的影响效果不明显。
Another important kind of interferences in reactor NAA is due to threshold reaction induced by reactor fast neutrons.
堆中子活化分析中的另一重要干扰是堆快中子引起的阈反应干扰。
The results indicated that exgeneous auxins, to some extent, might alleviate the symptom of the witches' broom of the seedlings, but the effects of the auxins were different with NAA and IBA.
结果表明，植物生长素类物质在一定程度上可以减轻豫杂一号泡桐丛枝病发病的症状，但不同种类的生长素对其减轻的程度存在一定的差异。
Low concentration NAA or BA beneficial to bud development and root formation.
低浓度BA或NAA有利于芽发育和诱导生根。
Different concentration combinations of NAA and 6-BA were setup in tissue culture media to study inducing effects of sprouts and roots of photinia fraseri.
在红叶石楠组织培养基中设置不同的萘乙酸（NAA）和6-苄基腺膘呤（6-BA）的浓度组合，研究其对不定芽和不定根的诱导效果。
Spraying GA and NAA are the effective methods to overcome the incompatibility in specific hybridization.
喷施外源激素是克服种间杂交不亲和性的有效途径。
NAA data are further analyzed using fuzzy cluster analysis to obtain a fuzzy cluster trend diagram.
将这批NAA数据进行模糊聚类分析，得到动态模糊聚类分析图。
Yushu 4 and Yushu 12 were used to study the effects of auxins(IBA and NAA), temperature and illumination time on plantlets regeneration from subcultured tip meristem in sweet potato.
以豫薯4号和豫薯12号为试材，研究了生长素类物质（IBA和NAA）、温度和光照时间对转移后甘薯茎尖分生组织培养成苗的影响。
Method: MS medium was used as basal medium and ba and NAA were supplemented to find out the optimal hormone combinations for adventitious buds initiation, adventitious bud multiplication and rooting.
方法：以MS培养基为基本培养基，通过研究植物生长物质BA和NAA对丛生芽的分化、丛生芽的增殖和生根的影响找出相应的最佳生长物质组合。
Choosing one-factor auxin was adverse to buds subculture multiplication of Lily, for example NAA or IAA.
使用单因子的生长素naa或IAA不利于百合的继代增殖。
The mechanisms underlying NAA recovery remain to be investigated.
NAA恢复的具体机制有待进一步研究。
The mechanisms underlying NAA recovery remain to be investigated.
NAA恢复的具体机制有待进一步研究。
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