查询词典 F-22

The direct incorporation of U-13C glucose was estimated by the intensity increase of m/z to F(F was parent fragment, and n was the carbon number in the fragment), while the total isotope incorporation from the added 13C could be calculated according to the abundance ratio increment summation from m/z (Fa+1) through (Fa was the fragment containing all original skeleton carbons, and T was the carbon number in the amino acid molecule). The 13C enrichment in the target compound was expressed as atom percentage excess, and that of D-amino acid needed to be corrected by the coefficient of hydrolysis-induced racemization. The 13C enrichment reflected the carbon turnover velocity of individual amino acid enantiomers, and was powerful to investigate the dynamics of soil amino acids.

外加葡萄糖直接合成氨基酸的比例可利用质谱碎片的相对强度变化来评价（n为质谱碎片F中含有的碳原子数目）；而源于葡萄糖的13C同位素在氨基酸分子中的富集程度是所有同位素峰相对强度变化的总和。13C在目标化合物中的富集比例用原子百分超评价，D氨－基酸的APE还需进一步利用水解诱导的外消旋化系数校正。13C在目标化合物中的富集程度可反映各氨基酸手性异构体的碳循环速率大小，是研究土壤氨基酸动态变化的有力工具。

A hypothesis is presented in the second chapter of this discourse based on the theory of F/M, to improve the unit's capability of phosphorus removed by advisably increase the value of F/M, and this hypothesis is proved to be practically feasible by a model experiment.

本文第二章从对F/M的理论分析出发，提出了在原有一体化氧化沟参数水平上适当地提高污泥负荷来实现提高除磷能力，使出水COD、TN、TP等指标全面达标的设想，通过模型试验证明这样的设想使切实可行的。

Air Chief Marshal Rao Quamar Suleman, Chief of the Air Staff, Pakistan Air Force, accepted the first F-16 Block 52 aircraft on behalf of his nation.

这18架属於F-16/Block-52 标准的战机，包括16架C型、2架D型，将使巴基斯坦拥有的F-16 系列战机总数增加到58架。

Carthlicum, and was located on region of wheat chromosome 2AL near the gene Pm4b, it maybe either Pm4b, or a new gene linked to Pm4b. Temporarily, the gene was designated as PmPS5A. A dominant major gene conferring resistance to powdery mildew was identified in a BC〓F〓 population derived from a cross of amphidiploid Am9 and wheat cv. Laizhou953. The gene originated from T.

通过与含有已知抗病基因品种或品系的对该20个菌株反应模式比较和系谱分析，推测Am9／莱州953*〓 F〓含有Pm4b，波斯小麦PS5含有Pm4b与一个未知抗病基因组合；（DR147／Ae14）／／莱州953*〓 F〓和硬粒小麦DR147含有Pm4a和一个未知抗病基因组合；尾状山羊草Ae14和小伞山羊草Y39含有新的抗白粉病基因。

The design of four-mirror anastigmat was analyzed, then a system with effective focal length of 1 200 mm and field of view of 0.8°×0.8° was designed , total length and f-number are 300 mm and F/6,respectively.The system has advantages of long focal length, relative short physical size and excellent ability in restraining stray lights.

分析了离轴四反的设计步骤，设计了一个焦距为1 200 mm，视场为0.8°×0.8°，相对孔径为F/6的光学系统，系统总长只有300 mm，并达到很好的光学性能，具有长焦距、小尺寸、良好的杂散光抑制能力等特点。

BACKGROUND: F-wave is a late muscle response which results from the antidromic activation of spinal motorneurones following peripheral nerve supramaximal electrical stimulation,and influenced by the balance of excitatory and inhibitory postsynaptic potentials on spinal motomeurons.

背景：F波是末梢神经接受最大电刺激，从肌肉诱发出来的后期合成活动电位之一，是脊髓运动神经元突触后电位的反映，对F波的研究已经被作为衡量脊髓运动神经元兴奋性的一种手段。

Especially in the NIR region,the luminescent properties are special:the emission spectra have difference from the theoretical values and some reported complexes,that is,the characteristic f-f emission bands of Ln~(3+) ions present obvious shifts,broad and splittings.

特别是在近红外区的发光具有特殊性；得到了一些与理论值及文献报道相比较有明显差异的发射光谱，即Ln~(3+)的特征f-f发射带产生了明显的位移、加宽或劈裂。

It is likely that Raytheon will use the APG-63, because it was designed specifically for the F-15 and has already been sold to equip F-15s for Singapore and the U.S. Air National Guard.

雷声公司很可能将采用APG-63，因为它是专门为F-15设计的，并且已经卖给新加坡和美国空军国民警卫队用来装备F-15s。

Vibrationally excited molecular nitrogen N*2 plays an important role in the F region ionosphere by increasing the loss rate of the dominant ion O+, thereby reducing the electron concentration in the F region of the ionosphere.

激发态氮分子N*2在电离层F区中起着重要的作用，它使F区占主导地位的O+离子的损失率增大，从而使该区的电子浓度减少。

My late father DR DAMIAN F Asiku was chairman managing director ( F Asiku INDUSTRIAL COMPANY LTD), in Kigali the capital of my country,and he was also the personal adviser to the former head of state before the rebels attacked our house one early morning and killed my mother and father in a cold blood.

我已故的父亲 DAMIAN F Asiku 博士是F Asiku 工业公司的总经理，在我的国家的首都基加利，他也是前国家领导的私人顾问。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。