它们的

In the fourth chapter, firstly it introduces the Boolean functions algebraic expressions of the 2-value clock-controlled stop-and-go generator and Gunther generator. It reveals the balanced property of the two kinds of Boolean functions, and studies the Walsh cycle spectrum and the autocorrelation function. It also obtains the coincidence rate of their output sequences with affine sum of some bits of input sequences, and analyzes their ability of resisting the best affine approximation cryptanalysis and differential cryptanalysis. Secondly, we properly present a new definition of the Best Affine Approximation, namely BAA on the Boolean vector functions, followed by the spectral characteristic of such defined BAA attacks through using the decomposition formula of the union distribution for random variables. A lower bound of such BAA attacks is proposed. Finally, we also study the spectral characteristic of the second kind of nonlinearity of Boolean vector functions, followed by a higher bound of such nonlinearity. Furthermore, the limited relationship between the second kind of nonlinearity of Boolean vector functions and the linear structure of the linear combination of every component is analyzed.

在第四章中，首先给出了2值密钥流"停走生成器"和"衮特生成器"中实际存在的布尔函数的代数表示，揭示了这两类布尔函数的平衡性，随后研究了它们的Walsh循环谱和自相关函数等，得到了它们的输出序列与输入序列中的某些bit的仿射项的符合率，分析了它们抵抗最佳仿射逼近攻击和差分攻击的能力；其次，我们合理地给出了布尔向量函数最佳仿射逼近的新定义，利用布尔随机变量联合分布的分解式考察了相应的谱特征，并给出了布尔向量函数与其最佳仿射逼近的符合率的一个下界；最后，我们还考察了布尔向量函数第二类非线性度的谱特征，给出了布尔向量函数第二类非线性度的一个上界，并揭示了布尔向量函数第二类非线性度与其各个分量的线性和的线性结构之间存在的制约关系。

It is best to use the leaves and flowers of borage when fresh, as they lose their flavor quite rapidly when dried.

最佳使用琉璃苣叶子和花在它新鲜的时候，因为它们相当迅速地失去它们的味道在乾燥时。

After investigation they learned that the brain wave, which was a side of the brain will sleep.

经调查它们的脑电波得知，它们某一边的脑部会呈睡眠状态。

Their banking systems are intact, and their economies are growing at breakneck speed.

它们的银行体系完好无缺，它们的经济正快速增长。

But if you want them to be callable from other programs, you must put their names in the export list in the module definition file.

但是如果你想让它们能被其它程序随时支取，你必须把它们的名字放在模块定义文件的输出表中。

While it is noon, we catch the chafer and wire its head or leg then let it fly.

在午后阳光最大的时候我们偷偷地溜进茄子地和苦瓜棚里抓金龟子，然后把丝线扎在它们的脑袋和腿上，然后把它们放飞。

It is for this reason that they have come down from their mountains and rejoined changeling society in large numbers.

由于这个原因，它们已经开始从它们的山地上下来重新加入为数众多的低能级社会里来。

But we don't know how coherent, we don't know their content...

但我们不知道它们的结合程度、我们不知道它们的内含物。。。

At the same time, the relationships for their structure characteristics and the properties are verified constitutionally.

培养了6种富氮化合物的单晶，用X射线单晶衍射分析测定了它们的晶体结构，证明它们均是离子型化合物。

Crested ibis like wetland and land as their habitat, they eat frog, small fish and other small animals.

朱鹮喜欢将湿地，陆地作为它们的栖息地，它们以青蛙，小鱼，和其他的小动物为食。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。