多河流的

However, in some special water areas the utilitization of StreeterPhelps model has some limitation as confirming reaeration coefficient often comes from tests in rivers with fast water flow speed with no consideration of wave effects. Furthermore, in practical research in Three Gorges Reservoir, the changing rule of COD appears abnormally. In some water areas far from pollution source, the value of COD changes with time, but does not follow the exponential attenuation rule. This phenomenon can not be explained by former modified StreeterPhelps model.

StreeterPhelps模型是目前进行河流水质研究常用的物理模型，具有良好的理论和实用价值，然而在某些特定水域，该模型的应用受到限制，主要原因是复氧系数的取定多在水流速度较大情况下得到的，而未考虑水面波动对复氧系数的影响，另外，在实际研究过程中发现三峡库区COD变化的规律出现异常：在离排污口相当远的水域，COD随时间变化趋势并不是指数衰减，而是在某个常值附近微小摆动，以往很多修正过的StreeterPhelps模型都无法解释这个现象。

This creates many problems.First,areas of land must be found to put the garbage.Second,much energy is wasted producing things to be thrown away.In China,a lot of platic bags are used.They produce"white pollution".Many lakes and rivers are polluted by the wastes from factories.With the increasing national wealth,more waste will be produced.If everyone in the country bought one soft-drink can each day and threw it away,there would soon be a huge mountain of garbage.Recently,many countries have made a law to deal with waste and control pollution.

首先，对土地必须找到把垃圾倒第二，很多浪费能源生产物品要扔掉了在中国，很多的塑料袋是用…他们生产的&白色污染&许多河流和湖泊被污染的工厂的废料…与日益增长的国家财富，更多的垃圾会产生如果每个人都在乡下买了一套可以每天软饮料，把它扔掉，不久就成为一个巨大的山脉的垃圾最近，许多国家已经通过一项法律来处理废物和治理污染的。

It seems a book in which concluds all kinds of answers,such as ,where is the mountains and rivers,why are there four seasons,why does southerner like eating spicily,why is Africa people's skin black,and so on.this is all answers that can be found on the satellite map.by this time,I am surprised that the internet take us so many convennience.

简直就是一个百科全书。山川河流，四季变化，丘陵平原，湖南的人为什么喜欢吃辣的，非洲的人的皮肤为什么是黑的。。。。。这一切的一切都能在地图上找到答案。说到这里又不禁感叹，网络和科技给人们带来的诸多方便。

After the addition of carbon, the microhardness in the grain boundary is about 150 MPa higher than that in the grain. The fracture type of pure Mo is intergranular fracture, the grain boundary strength of Mo-C alloy is strengthened due to the addition of carbon and the fracture type is changed to transgranular fracture, transcrystalline fracture and a large number of cleavage planes and steps are observed on the bending fracture surface. But if the carbon content is too high, the carbide precipitation will be severe at grain boundaries and is deleterioated to the ductility of the alloy.

添加碳后，合金的晶界显微硬度比合金的晶内显微硬度高150MPa左右；纯钼的断裂方式以沿晶断裂为主，添加碳后，由于合金的晶界强度得到提高，合金的断裂方式变成以穿晶断裂为主，断口上有大量的解理面，具有明显的河流状花样和解理台阶，且塑性越好的断口，撕裂岭也越多；当添加的碳含量偏高时，在晶界处产生了大颗粒的碳化物，这种大颗粒的碳化物会降低合金的塑性。

According to the "Waterbirds Species List" published by the State Forestry Bureau in 2003,the waterbirds in 8 zoogeographical prefectures and 4 zoogeographical provinces in Shaanxi Province were counted,and the community similarity indices between each zoogeographical prefecture and zoogeographical province were figured out.

河流众多的关中平原省的渭河谷地平原州的水鸟种类最多，有85种，水鸟最少的是干旱的黄土高原省的南部黄土塬土石山地梢林州，仅有23种；群落相似性指数最高的是相邻的黄土塬土石山地梢林州和渭北台塬州。

For example, in a recent election, voters had to decide if they favored or opposed an increase in property taxes, the construction of a canal that would divert water from one part of the state to another, mandatory AIDS testing for criminals, and a rent control ordinance, in addition to deciding which candidate they preferred for diverse political offices including governor, state treasurer, county commissioner, and trustee of the local library system.

选民除了要决定各种各样的行政职务--包括州长、财政部长、县长、地方的图书馆董事等等--的最佳候选人之外，他们还要对诸多内容做出赞同或反对的决定，这些内容包括，一项增加财产税的措施，一个有可能将河流从国家的一部分转向另一部分的运河建造工程，对罪犯进行强制的艾滋病检测规定，以及一条租金控制的条例。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。