应时的

When TEOS reacted with moderate water, the β－ SiC with the size of about 15～ 20 nm could be synthesized under both of the acid and basic conditions.

适量水与TEOS反应时，无论是在酸碱条件下都能得到粒径为15～20nm左右的β－SiC粉。

The result shows that catalyst concentration, reaction time, urushiol concentration and temperatures affect the polymer yield in oxypolymerization of urushiol system.

讨论了该配合物作为催化剂，催化漆酚氧化聚合反应时，催化剂浓度、时间、底物浓度以及温度对漆酚氧化聚合反应的影响。

The crystal belongs to monoiclinic with space group P2 1/n, a=1.7073(7)nm, b=1.7447(7)nm, c=2.4333(10)nm,β=109.694(7)°, Z=4,V=6.824(5)nm 3, D x=1.282g/cm 3,μ=0.793mm -1, F(000)=2696, R 1=0.0563, WR 2=0.1539. In the crystals of compound, the tin atoms rendered seven-coordinate in a distorted pengonal bipyramidal structure.

我们以 NEt3 作缚酸剂，用 Ph3 Sn Cl与 2 ，6 -吡啶二甲酸以 1∶ 1摩尔比反应时，没有得到预期产物 Ph3 Sn O2 C(2 ，6 - Py)CO2 H ，而是得到一种 Sn- Ph键断裂的离子型有机锡化合物(Scheme1 )。

When bromine was used to bromization reaction with 4-acetyl-guaiacol,the product bromide incompletely or super bromide partial,and the selectivity was poor.

使用单质溴与4-乙酰基愈创木酚进行溴化反应时，产物溴化不完全，或者局部过量的溴化，且选择性较差。

For the reaction between divinyl sulfone and N-ethylethylene-diamine or N-methylpropane-1, 3-diamine , no cross-linking occurred when the feed ratio of A〓 to BB'〓 was 1/1. When the feed ratio of DV to NDA or NPA is 3/2, no cross-linking occurred too in organic solvents such as DMSO, DMF and NMP, while cross-linking does occur in water.

对于二乙烯基砜与N-乙基乙二胺或N-甲基-1，3-丙二胺的反应，当加料配比为1／1时，反应在水和有机溶剂中不会凝胶；当配比为3／2时，反应在有机溶剂中亦不凝胶，而在水中反应时，会经过一种&假凝胶&过程，并最终发生凝胶。

When used as exophoric reference to indicate the concepts of space and time in the real world, this/that and ii/IP have no much difference between them.

在用于外指照应时，就其所指的时间和空间概念来说，this／that与&这/那&之间并无多大差异，即this和&这&指近，that和&那&指远。

The fluctuations and phase transition properties of light intensity are investigated in Chapter 3 for a two-mode inhomogeneously broadened laser taking account of full saturation effects with multiplicative noise stemmed from disturbances in laser gain parameter.

第3章讨论了非均匀展宽双模激光中当乘法噪声由增益参数涨落引起并计入全饱和效应时，光强的涨落和相变特性。

He was finally cured with a 6-month course of antituberculous chemotherapy. We conclude that tuberculosis should be considered in infants or young children with pneumonia that presents radiologically as pneumatocele formation, especially in whom there has been no response to empiric antibiotic therapy.

由此病例报告显示，结核杆菌可引起婴儿或较小儿童的肺炎，并可能并发肺中形成，当此类病人对广产性抗治疗没有反应时，务必将结核杆菌感染列入鉴别诊断。

So when the patient responds to their treatment, no one is ready ...

所以当他们的病人有所反应时，他们开心得不知如何是好。。。

As the material penetrates into the surface and the chemical reaction starts you are already on your way to a hardened, densified, dust proofed floor. This process will continue for several months.

当材料渗入混凝土里面并与混凝土各种成分发生化学反应时，您已经离拥有一个硬化、致密、防尘的优质工业地坪不远了，这个过程将会持续几个月。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。