查询词典 h.

The yield of allyl glycidyl ether can reach up to 96% at 30 ℃ for 3 h at a molar ratio of 1 to 1.5 of sodium allylate to epichlorohydrin.

醚化反应中固体烯丙醇钠与环氧氯丙烷摩尔比为1：1.5，在无水条件下于30℃反应3 h，烯丙基缩水甘油醚的收率达96%以上。

Since H. Bohr proposed the theory of almost periodic function, this field has been developed greatly.

自H。 Bohr提出概周期函数理论以来，这一领域得到了很大的发展，其发展过程的一个主要特点就是其函数范围不断扩大。

Two recent product announcements nicely mark a crossroads in SoC architectural thinking. The iPhone, standing at the end of a long tradition in hardware-block-oriented SoC design, points aloofly into the past, and an H.264 high-profile CoDec chip from Mobilygen, coming from a very different tradition points into a possibly very different future.

最近有两个产品的发布标志着关于SoC结构的考虑来到一个交叉点。iPhone，站在长久以来以硬件模块为导向的传统设计的尽头，开始远离过去；而来自Mobilygen公司的H.264高质量类编解码器芯片，源自不同的传统观点也有可能会走向一个不同的终点。

AlphaShares waded through a whole alphabet soup, in fact, to build an index including H shares and selected Chinese companies listed in the US.

AlphaShares好不容易喝完了整碗的"字母汤"--即创建纳入H股和精选的一批在美上市的中国企业的指数。

In order to study the behavior of fast pyrolysis of corn stalk powder, a set of fluidized bed with feed-in amounts of 5 kg/h was designed. 450, 475, 500 and 525℃ were adopted and aluminous soil was used as bed materials. The influence of reaction temperature on the collection rate of pyrolysis production was specially investigated.

在自行研制的一套进料量为5 kg/h流化床上，选用高铝矾土为流化床床料，选择450℃、475℃、500℃和525℃四个反应温度对玉米秸秆粉的快速热裂解规律进行了研究，主要考察了不同反应温度对热裂解产物收集率的影响。

Using mordern physical chemistry techniques (such as XRD、 TG-DTA、 IR、 XPS and 〓Xe-NMR)、 chemical adsorption techniques (NH���-TPD、 H���-TPD、 TPO、 TPR etc.) and pulse flow microreaction of n-hexane、 methylcyclopentene and n-hexane containing 0.2ppm thiophene, we studied mainly the following three points:(1). the changes occured during the calcination pretreatment of Pt ammine complex supported on β and L zeolites;(2). the effect of structure and acidity-basicity of zeolite on the dispersion and electron state of Pt particles; and (3). the influence of second metal component on the reactivity of nhexane aromatization and sulphur-resistance of Pt/L zeolite catalyst. Several interesting and valuable results are obtained and summerized as follows

本论文运用各种近代物理表征方法(XRD、BET、TG-DTA、IR、XPS和〓Xe-NMR)、化学吸附技术(NH〓-TPD、H〓-TPD、TPO、TPR等)和正己烷、甲基环戊烷及含噻吩正己烷的脉冲微反等方法，着重研究了(1)载Pt的β和L沸石在分解预处理过程中发生的变化；(2)沸石载体结构及酸碱性对Pt粒子分散及电子状态的影响；(3)第二金属组份对载Pt沸石催化剂上正己烷芳构化及抗硫性能的影响等，得到了某些有意义的结果。

In the process of ammonification, nitrification of organic N, H+ will be released, which causes the drop of pH value. There is significant negative relationship between TN and pH value.

有机氮在氨化、硝化过程中，会释放出H~+，引起环境pH值下降，两者有明显的负相关关系，在芦苇和茭草湿地的相关系数分别为-0.8181(n=27)和-0.6932(n=19)。

Based on the mineral distribution and assemblage in the run products at 1035 GPa and 950 ℃ for 20300 h, the textural development of amphibolite during the partial melting process, the metamorphic reaction, and the garnet corona generation are discussed.

依据实验产物的矿物组合和新生矿物的分布特征，讨论了950℃、10~35 GPa、恒温(20~300 h)条件下，斜长角闪岩部分熔融过程的结构变化、变质反应以及石榴石冠状体的成因。

When the concentration of metamorphic amylum production wastewater in the experiment was 12 640 mg/L and the optimal hydraulic retention time was 48 h, the removal efficiency of COD was 85.9%.

试验用变性淀粉废水的COD浓度为12 640 mg/L，最佳HRT为48 h，此时COD去除率85.9％。

Nonlinear frequency response characteristics of a 2K-H planetary gearing system with multiple backlash has been calculated by using the developed analytical MDOF harmonic balance method, and has been compared with corresponding linear system. Again, influence of parameters on dynamic behavior is discussed.

通过采用本文推导的多自由度解析谐波平衡法求解2K—H行星齿轮机构的稳态响应，本文计算了间隙存在时行星齿轮系统的非线性动态特性，并就系统的非线性动态特性与线性系统的对比以及参数对行星齿轮系统动态特性的影响进行了分析。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷