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The results indicate that the type and number of the substituents affect the toxicity of these compounds directly. A nitro group substitution increases the toxicity of the compounds, and on the contrary, an amido group substitution decreases their toxicity. For multi-nitrobenzenes, the toxicity of the o - or p -substituted nitrobenzene is bigger than that of the m -substituted one.

苯环上取代基的类型、数目和取代位置直接影响到标题化合物的毒性大小，强吸电子基如硝基会降低 Q -NO2和 E LUMO大小，使化合物毒性增强，且邻对位硝基取代的毒性高于间位取代；相反，给电子基团氨基的存在则会使化合物的毒性降低。

Results showed that the former afforded an yield over 80% and the regioselectivity up to 5.4, both were higher than that using nitrous acid as nitrating agent.

结果表明：以硝酸铜作硝化剂时的硝化收率可达80%，P/O比值最高为5.4，均比用相同浓度的硝酸作硝化剂时要高。

In this paper, we introduce the estimation and algorithm o f p arameter and some diagnostic statistics. We deduce the computation formula of curvature and conformal normal curvature for four perturbations of models.

本文主要介绍了指数族非线性模型的参数估计及其算法，若干诊断统计量，并将保形法曲率应用到指数族非线性模型中，推导了模型四种扰动方式的曲率和保形法曲率计算公式。

P: I was O K when I left party.

病人：当我离开聚会时还好。

We talk much,we love only a little,and we hate too much; 7 c/ r0 P; d$ O

我们说的多了，爱的却少了，我们的仇恨也更多了； 4 W。

2 P C* O; G0 d0 S' Q I would not waste my time pursuing that.

如果是我的话，不会将时间浪费在这里。

" E+ P7 f" o A$ G- P$ s: D4 N It remains to be seen to what degree the president's personal appearance will move Republicans to work harder to find common ground with the president, and to shed a label applied to them in the president's first year: the party of "no".

奥巴马总统本人亲自出席会议这件事，究竟会在何种程度上推动共和党人更加努力地寻找和总统的共同点，撕掉他们在奥巴马总统就任第一年给自己的党所贴上的"说不党"的标签，这一点还有待观察。2 ~' T ！

It will be helpful for the understanding of a complete process of the petrogenesis and evolution of pegmatites, the impact of voltiles (including H〓O, F, B, P) on the physical prorerties of peraluminous magmatic system, and the fractionation of REE and incompatible elements in the system.

对上述问题的研究和探讨，将有助于了解伟晶岩形成和演化的全过程，有助于了解挥发分对过铝质岩浆体系物理性质以及对REE和其它微量元素地球化学行为影响，这对于理解过铝质岩浆体系成岩、成矿作用过程具有重大的理论和实际意义。

The Yankees lost on Tuesday to the Indians, 5-3, on David Dellucci's pinch-hit three-run home run off Joba Chamberlain in the eighth inning.

j4 |6 K8 o； p！王建民加油站洋基在前一场因为被第8局代打上阵的David Dellucci从Joba手上打出逆转的三分全垒打以5-3输给印地安人。

Pulmonary function was measured by HI - 701 advanced pneumatometer.

其中采暖期结束时的FVC、FEVI.O均低于采暖期水平(P.05)。

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。