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Basing on the Graf′s addition theorem, two expessions, interior and exterior expression, are deduced and the suitable problems for them are discussed. It has been found that the interior expression is the main point for sovling the scattering problem of circular inclusion in half-space. It also has been found that the exterior expression is the key for the scattering problem of circular arc canyon and circular arc alluvial valley, and is one of the main points for scattering problem of circular arc hill as well.

从Graf原有加法公式出发，本文给出了其内域型和外域型两种表达形式并讨论了这两种表达的适用范围，同时指出：内域型表达是求解半空间内含夹塞区出平面散射问题的要点，而外域型表达是解决任意圆弧型凹陷地形和任意圆弧型沉积盆地出平面散射问题中求解难点的关键，同时也是克服任意圆弧型凸起地形出平面散射问题求解困难的要点之一。

Most available Identity-based Authenticated Key agreement protocols require expensive bilinear pairing operation. This paper proposes a pairing-free ID-AK protocol from additive elliptic curve group.

摘要鉴于目前大多数基于身份的认证密钥协商协议需要复杂的双线性对运算，该文利用椭圆曲线加法群构造了一个无双线性对的ID-AK协议。

It has been reported that ozone is a key intermediate among the products of plasma, and hydrocarbon is a common additive for this process.

为了解重要的活性中间产物O3的作用和生成特性以及常见的烃类添加剂C2H4的作用，在介质阻挡放电等离子体反应器内进行了相关实验研究。

After that, the issue, which should be solved in the picture additive process, is discussed in detail. On the base of analyzing digital television signal data construction, TBC processes is put forward to apply in each group signal. Effective data taken off from the key signal is also solved. And the choice and insertion is used to protect assistant data.

接着，详细讨论了在图像叠加过程中应解决的问题，在分析了数字电视信号数据结构的基础上，提出了对各路信号进行TBC处理的方法，同时解决了对键信号进行有效数据提取的问题，并通过选择插入的方式对辅助数据进行了保护。

Additive is one of the key points of coal water slurry technology.

添加剂是水煤浆的关键技术之一。

But the safety of the animal feed and the additive is still the key to solve the problem.

而饲料和饲料添加剂的安全问题则是其中的关键环节。

You have to force your sleep addled brain into wakefulness, move your stiff legs and retrieve the key before the alarm goes off.

你必须强迫你的睡眠混乱的大脑进入觉醒，移动你的僵硬的腿和检索密钥之前报警熄灭。

We will ship together with one invoice with the serial number, your name, your address and other register information you key in for the online shop.

我们将船连同一张发票与序号，你的姓名，地址和其他注册资料，你的关键，在为网上商店。

Key words:Address Resolution Protocol Address Resolution Protocol finds the hardware address of a host from a known IP address.

地址解析协议可以由已知主机的IP地址在网络上查找到它的硬件地址。

Key words:Reverse Address Resolution Protocol Reverse Address Resolution Protocol discovers the identity of the IP address for diskless machines by sending out a packet that includes its MAC address and a request for the IP address assigned to that MAC address.

逆向地址解析协议可以通过发送一个包含有无盘主机MAC地址的数据包，来询问与此MAC地址相对应的IP地址。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。