明显特征

Toxicity and species difference are the other problems of CPTs. Homocamptothecins , a novel CPT analog which contain an expanded seven-membered β-hydroxylactone, have shown elevated antitumor activity and improved stability without species difference.

高喜树碱是近年来刚刚出现的一类CPT类似物，其特征是将α—羟基内酯环改造成七元的β—羟基内酯环，不仅活性明显提升，而且体内代谢稳定性也大大提高，并且不存在种属差异现象。

The ore bodies are characterized by the sedimentary and post-sedimentary hypothermal overprint mineralization.

矿体具明显的沉积和后期热液改造特征，硫同位素δ(34S)值为-0.11‰~11.10‰，平均为5.73‰，接近大气降水的δ(34S)值。

It is to think network advertisement at or surpass traditional advertisement, cheap Mo place does not go to charge; 2 it is Shu of one-sided pursuit impression, impressional Shu is one of levels that measure network advertisement effect, but sometimes one Ge visits Ke Zai a website can produce ten Ge even Shu of two Ge impression; San is to feel integrated big website is straighter than hanging down effect of advertisement of site of is good, but accept the product ad with apparent feature of numerous target group to great majority, this kind of choice is unwise.

一是以为网络广告等于或胜过传统广告，费用低廉无所不到；二是片面追求印象数，印象数是衡量网络广告效果的标准之一，但有时一个访客在一家网站就可以产生十几个甚至二十几个印象数；三是以为综合大网站比垂直站点广告效果好，但对于大多数受众目标群体特征明显的产品广告，这种选择是不明智的。

The shell structure of electrons reveals that the magic number doesn't exist obviously in the Al n clusters as in the alkali metals. The energy levels are apparently incontinuous in the Al 2～7 clusters.

在Al2～Al7团簇中，能级结构呈现明显的分立特征，费米能级随着原子个数的增加而减小，到Al7时又有所增加，且团簇的能量间隙最小。

The inial optimizing value is chosed according to Rayleigh wave with dominant energy in the Lamb's problem and the difficulty of calculating the velocity of Rayleigh wave of transversely isotropic saturated soils is solved.

分析表明：瑞利波速在饱和均质半空间具有弥散性，各向异性参数ζ〓、ζ〓对瑞利波速有明显影响，ζ〓在特征频率附近对瑞利波速的影响较大，在高低频区段对瑞利波的影响较小。

This paper analyses the instrumentally rationalized behaviour and its positive and negative aspects,and suggests countermeasures to guide students.

这种行为取向带有明显的工具主义特征。工具主义是美国实用主义哲学家杜威所创立的一种哲学，意为效果等同于真理，强调认识的工具性[1] 。

Aiming at the established three-layer infrared radiative transfer model of pollution cloud, the infrared radiative spectra of the pollution clouds at different concentrations were simulated with the field background spectra (that are measured by Fourier transform infrared spectrometer) and every interferent radiative spectrum as the basic radiative data.

当模型考虑干扰物和背景辐射的变化影响时，污染云团在810cm-1，920cm-1和1040cm-1波段上的光谱特征明显减弱。

Aiming at the established three-layer infrared radiative transfer model of pollution cloud, the infrared radiative spectra of the pollution clouds at different concentrations were simulated with the field background spectra (that are measured by Fourier transform infrared spectrometer) and every interferent radiative spectrum as the basic radiative data.

结果表明：利用实测场地背景辐射光谱和该模型仿真污染云团DMMP红外光谱，光谱在810cm-1，920cm-1和1040cm-1波段上有明显的特征峰。

Seismic data in Sudan studied area has following feature:①complex structure and developed faults;②large work area that resulted in reflection events for same horizons being inconsistent to whole area;③irrecognizable seismic feature of target.

苏丹研究区的地震资料具有以下特点：①构造复杂且断层发育；②工区面积大，同一界面反射轴在全区内不统一；③目的层的地震特征不明显。

Chapter 8: We discuss the acceleration of multigrid by Krylov subspace approaches, and recognize the reason for slow convergence of algebraic multigrid methods is that error reduction is significantly less efficient for some very specific error components which may cause a few eigenvalues of the algebraic multigrid iteration matrix to be considerably closer to 1 than all the rest. However, the eigenvectors belonging to the few isolated eigenvalues can be expected to be typically captured after only a few conjugate gradient iterations, which accelerate algebraic multigrid algorithms. Theoretical analysis and numerical results of some practical problems show the iterant recombination accelerates algebraic multigrid convergence.

第八章：先介绍用Krylov子空间迭代法加速一般多重网格方法收敛的基本框架，然后紧紧抓住引起代数多重网格方法收敛减慢的根本原因往往是误差减小对几个特别的误差分量不明显，这导致代数多重网格方法的迭代矩阵的几个特征值接近于1，而共轭梯度方法则能比较典型地捕捉属于孤立特征值的特征向量，从而推导出有效的共轭梯度加速算法和程序实现，不仅从一些具体的实际应用例子的数值结果去验证迭代复合加速收敛的效果，而且还从理论上分析了预处理共轭梯度法加速代数多重网格法收敛的机理。

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。