三两个...

In two hours of prime time TV you might see ads for two to three different brands of cars.

在观看电视的黄金时间中的两个小时里你有可能看到两到三种不同品牌汽车的广告。

By means of two different methods, the author derives a general equation for expanding the product of two Jacobis triple products, which can be considered as the common generalization of the quintuple, sextuple and septuple product identities.

利用两种不同的方法，作者建立一个关于两个Jacobi三重积之乘积展开的广义公式，它可以看作是五重积，六重积和七重积恒等式的统一形式。

Second, the distributions of the two series are both non-normal, and one series from auction mechanism has peaker mountaintop and fatter tail than the other series from continuous order-driven mechanism. Third, the auction will bring more noise in terms of stock yield, and demonstrate more deviation in the random walk in the market efficiency model.

第二，通过两种交易制度得到的两个股票收益序列的分布都是偏正态的，并且从集合竞价得到的序列比从连续竞价得到的序列尖峰厚尾；第三，集合竞价产生的股票收益比连续竞价产生的股票收益有更大的噪音，对市场有效假说的随机游走形式更大的偏离。

There is a trick, too, behind their "Hamlet". Scenes from a modern-dress Broadway production, starring Richard Burton as the prince and filmed over two nights in 1964, flicker on the screen throughout the two-and-a-half-hour performance.

哈姆雷特》也不例外。1964年，里查德·伯顿参演的百老汇现代服装版《哈姆雷特》被搬上荧幕后只有两个半小时，但是拍摄剪辑却进行了三天两夜。

In a word, this two chapters, focusing on the analysis of two women characters, especially Sula, the heroine, depict three different kinds of black women: Eva, the ancestor of self-searching, passive and assimilated by the male-centered consciousness in the end; Sula, a new world woman, completely independent in self-searching and Nel, the future successor to Sula in the pursuit of self and thus show Morrison"s profound recognition of the hard process of black women"s self-searching.

总之，这两章通过对小说中两个主要人物，特别是通过对女主人公秀拉的分析，展示了三种不同的女性形象：被动探寻自我并最终被男性意识同化的的老一辈人物伊娃，完全独立追寻自我的新时代女性秀拉以及未来追寻自我的秀拉的继任者内儿，从而强调了黑人女性追寻自我历程中的艰难。

In this paper, we mainly study the adjacency spectrum of simple connected undirected graphs. Some results will be given in this thesis.

本文中分两个部分集中反映了作者三年来围绕一般简单连通无向图的邻接谱的界所取得的主要结果，包括两类特殊图类的邻接谱，具体结果如下： 1。

The arithmetic of the subtraction is based on the serial arithmetic. It can entirely enumerate every pair of subtrahend on a bit, and it also calculates two possible loaning carry values on each bit. So the subtraction can be operated through automatic selection, and complete collateral subtraction and carry operation. The method of single division is same to it. With the stenography of shifengshou we can solve the complex division. We put the formula and the technique into the DNA model to get the result. The methods all make the step decrease and change the conventional arithmetic.

减法的DNA 算法理论主要是来源于串行思路中的算法，它是将每一位上的两个减数对的所有可能进行全列举，同时考虑每一位上的两种借位信息，使得运算进行自动选择，一步即可得到最终结果的算法；除法中一位数除多位数的算法还是从我们平时所进行的串行运算中得到启发而设计的算法；而除法的多位计算思路则来源于史丰收速算法，将算法中的口诀及技巧应用到DNA 链当中，使得传统中的代数运算能够并行的得到最终的结果，这三种算法的设计都使得计算步骤减少，从根本上改变了算法的运算机制。

And the results indicate that the principal stress directions in study area are mainly NE-SW, and the second substage tectonic twist made the direction deflect from North to East, but the primary direction changed little; tectonic activities during the O〓～S～D stage is some violent, most of the area are under high stresses status, and rock fracture degree is correspondingly higher, as coinciding with the drill cores observation, i.

通过数值分析，模拟了塔中Ⅰ号断裂带和塔中45井三维模拟区O〓灰岩的构造应力场和应变场，结果表明：研究区主应力方向为北东～南西向，第二期的构造扭动使其由北向东发生了一定的偏转，但总的方位变化不大；O〓～S～D时期，塔中地区构造运动较强，研究区大部分处于高应力状态，岩石破裂程度较高，而岩芯观察结果也证实了这一结果，即O〓灰岩地层中早期形成的构造结构面比较发育，单个结构面的规模也较大；C～P时期，岩石的破坏程度较早期有所提高，主要表现在两个方面，一是各局部区岩石的破坏程度普遍有所提高；二是各个级别破裂区的分布范围相应地扩大了；研究区应力分布表现出明显的不均匀性，特别是剪应力，无论是O〓～S～D时期，还是C～P时期，都有很大的差异性，特别是在小断层的端部，剪应力比较集中，而且在断层的两盘，剪应力方向和大小都变化极快。

In this text we used the method of volume integral equation base on tensor Green's function to study the forward of 4D transient electromagnetic response.

本文采用基于张量格林函数的体积分方程法进行四维模型瞬变电磁响应的正演研究，文章中首先说明了四维瞬变电磁法模拟的可行性及程序实现，然后分别设计了两个三维异常体模型，采用两种观测方式(激发与接收平行、激发与接收垂直)进行正演模拟计算，并对所得的二次总场的数据进行了分析。

The optical illusion occurs because our mind tries to convert a two dimensional object into three dimensions. We try to assign 3D aspects to this illusion which are not there.

产生这种现象是因为我们的潜意识里希望把两维的物体转换成三维的，所以对这张图，我们的眼睛就试图去补上并不存在的横木的两个面。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。