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1H NMR spectroscopic analysis of aromatic protons combined with theoretical analysis of molecular structures proved the existence of two rotational isomers at 300 K, as well as a rapid interconversion equilibrium at 330 K for both compounds Ⅰ and Ⅱ. However, only one conformer exists for compound Ⅲ and puerarin containing 7-phenolic hydroxyl instead of propyl in A-ring as the case of compounds Ⅰ and Ⅱ. Based on UV-Visible absorption data of neutral and basic solutions, and on the density function calculations, the 7-phenolic hydroxyl group in A-ring was found to be more acidic than the 4'-phenolic hydroxyl group in B-ring. The mechanism of derivation reaction and the structure-reactivity relationship of puerarin as an antioxidant were further discussed.

其中7-丙基葛根素Ⅱ属于新型取代衍生物；变温1H NMR和理论计算结果表明，在300 K时，葛根素和4'-丙基葛根素以单一构型存在；而7，4'-二丙基葛根素和7-丙基葛根素则存在两种核磁可分辨的旋转异构体，当温度升至330 K时，两种异构体可以相互转化；通过对比分析葛根素及其衍生物脱质子产物的紫外可见吸收光谱并结合理论计算，确定了A环上7位酚羟基比B环上4'位酚羟基先脱去质子，并由此进一步阐明了葛根素衍生化反应机理以及在抗氧化作用中可能的活性位点和结构活性关系。

At that point, any neutral (or "conquerable") station in the system becomes the property of the successful alliance, and remains so until an enemy destroys enough alliance POSs and replaces them with its own.

这此方面，任何被占领的空间站就变成了主权联盟的所有财产，除非敌军摧毁了这些POS且在此星系插上了自己的POS主权才会失效。

The stability of copper reduced because of the formation of copper oxide under alkaline condition, while the stability of copper kept the same because of the constant chemical structure under near neutral condition.

在去离子水中， Cu-KEtX的化学结构则没有明显的改变，故对Cu的稳定性亦不变。

In the view of technological determinism and social constructivism, technology is not value- neutral.

从技术决定论和技术的社会建构论的角度来看，技术并非价值中立。

Doctors then begin information gathering by using open-ended questions to elicit comprehensive information from patients. While listening to patients, doctors should maintain an open-minded and impartial attitude of listening by giving neutral feedback or continuer, such as "m-hng" which encourages patients to continue their narrations, in response to information provided by patients. If patients agendas are not revealed at this stage, doctors may also try specific open-ended questions for clarifying agendas, such as What do you think causes your problems?

在第四议题我们提出四个洞察病人求医动机的步骤与方式：透过一开始的寒暄问暖，提供病人「语言暖身」的机会，建立与病人的信任关系使其卸下心防；在主诉阶段透过「开放式问句」询问病人之适；在聆听叙述时，可透过「中性回应词」（例如「嗯哼」、「然后」），以保持中立且不打断的聆听态度并取得病人就医问题全貌；若上述步骤未能导出动机，则可视情况以开放式问句询问病人，例如「汝感觉是什麽原因予汝这呢难苦钦？

By using the method of an abstract continuous theorem of k-set contractive operator and some analysis technique. Sufficient conditions are derived for the existence of at least one strictly positive periodic solution of periodic two-species Lotka-Volterra competition dynamics systems with neutral delay and several deviating arguments.

利用k-集压缩算子抽象连续理论和某些分析技术，导出了此具有中立时滞和变差元的周期两种群Lotka-Volterra竞争动力系统至少存在一个严格正的周期解的充分条件。

The results indicate that the weak election-withdrawing group 4-hydroxymethyl in 4-position of pyridine in 4-HMDPA could weaken the fluorescence intensity of the lanthanide complexes. The contradistinctive experimental results show that the fluorescence intensities of these complexes are related to pH value of the aqueous solution and the dipole moment of solvent molecule: in the neutral aqueous solution,the fluorescence intensities of these complexes were strongest,while the less the dipole moment was,the stronger the fluorescence intensity was.

结果表明，在吡啶4位引入弱吸电子基团4-羟甲基会减弱稀土配合物的荧光强度；在水溶液中稀土配合物与溶液的pH值有着密切的关联，中性水溶液中荧光强度较大；分子偶极矩较小的溶剂中稀土配合物荧光强度较强。

A partnership with the Costa Rican Government, who wants to be carbon neutral by 2021, will have both sides working together towards their goals.

伙伴关系与哥斯达黎加政府，谁想要成为碳中性2021年，将有双方的共同努力，实现其目标。

When none of the sliding gears is in mesh with its countershaft gear, the gears are said to be in neutral.

如果没有变速齿轮组与副传动轴上的齿轮啮合，这时，就叫做空挡。

In view of risk-neutral probability measure, this paper discusses the pricing of coupon bond in several periods and the pricing of options on the bond in floating interest rate. The article sets up a model of bond price in an enterprise.

本文主要是在风险中性测度下，基于浮动利率条件，讨论带有违约风险的多时期附息票债券的定价问题及基于该类债券的期权定价问题。

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。