查询词典 withdrawing

A group of pyrylium salts with different substituents has been synthesized in this work. Their fluorescence life time, quantum yield and quenching constant by BVE have also been measured. It was found that a strong interaction was observed between BVE and pyrylium salt which contains an electron-withdrawing group, and contrary, the introduction of electron-repulsive groups to the pyrylium salt will decrease this effect. It indicated that these reactions possess the characteristic of electron transfer.

本工作合成了一组带不同取代基的氧鎓盐化合物，并对它们的荧光寿命、荧光量子产率以及用丁基乙烯基醚进行猝灭的荧光猝灭常数进行了测定，发现带拉电子基的氧鎓盐化合物和BVE间存在着较强的相互作用，相反，推电子基的引入则减弱了这种影响，表明反应具有电子转移性质。

The $32 million inventory write-down we took in 2003 occurred because of falling prices for used aircraft early in the year. Specifically, we bought back fractions from withdrawing owners at prevailing prices, and these fell in value before we were able to remarket them. Prices are now stable.

我们在2003年认列的3200万存货跌价损失，其发生的原因在于当年度中古飞机价格下滑的因素，其中较特别的是我们以当时的市场价格从一些退订的客户手中买回部份所有权，而在我们再度将他们出售之前，市场价格进一步滑落所致，目前市场价格已趋于稳定。

The relationship between the molecular structure and fluorescence performance of reagents was discussed in brief, and the influence of the electron-supplying and electron-withdrawing groups to the fluorescence performance of carboxylphenylazo rhodanine ramifications was also studied.

简要探讨了分子结构与荧光性能的关系，讨论了供、吸电子基团对羧酸基偶氮若丹宁类衍生物荧光分析性能的影响。

The results showed that the MS2 fragmentation pathways of DASSSB were affected by the character and position of substitutes on salicylidene phenyl. The C=N cleaving to form fragmentation ion [M+H-283](superscript +) was dominant for DASSSB compounds with electron-donating group on the C4 of the salicylidene phenyl; while fragmentation ion [M+H-254] (superscript +) forming by C-C cleavage of the β-position of C=N was dominant for DASSSB compounds with electron-withdrawing group on the C5 of the salicylidene phenyl.

结果显示，这些化合物的ESI-MS/MS裂解方式与它们分子中水杨醛苯环上取代基的性质和位置有关：当水杨醛苯环上4位连接供电子取代基时，分子以CN双键断裂为主，生成[M+H-283]碎片离子；当水杨醛苯环上5位连接吸电子取代基时，分子以CN双键β位的C-C键发生断裂为主，生成[M+H-254]碎片离子。

The chemosynthesis sedative-hypnotic is widely applied in the clinic to treat somnipathy, but those shorten SWS and REMS resulting in producing some side effects, such as dizziness, somnolence, dependence and addiction for longly taking medicine, rebounding phenomenon and abstinence for suddenly withdrawing medicine.

临床上常用的化学合成类镇静催眠药，作用特点在于使失眠者入睡快，中间不易醒，但都(95％)不同程度地缩短了SWS和REMS，致使连续用药后出现头昏、嗜睡等症状，久服产生依赖性和成瘾性，停药时出现反跳和戒断症状等不良反应。

The conversations (below 60%) of these polymerization reactions are much lower than those of TPH and DCB, indicating that the trimerization is favorably promoted by the activation of strong electron-withdrawing substitutents in the para-orientation.

自制二腈聚合转化率均低于60%，低于TPH和DCB的转化率，说明吸电子对位取代基有利于氰基的三聚反应。

Financial institution withdrawing from the market, including unconstraining and constraining.

我国金融机构市场退出有一些共性问题。

I know, but I'm not withdrawing, Tom.

我知道，汤姆，但我不会退缩的

I think their withdrawing is in your favour.

我以为他们的退庭是于你有利的。

I think the results of google's withdrawing is serious

我想谷歌的离去造成的影响是严重的。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失