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To overcome the disadvantages of standard BP networks, two unproved algorithm are put forward. One is information entropy based, and the other is genetic algorithm based.

针对标准BP神经网络的缺点，提出了两种改进方法：①基于信息优化的网络学习算法；②基于遗传算法的网络学习算法。

However, there are several disadvantages in the course of FTA building, such as incomplete of a series of legal system, the irrational economic structure, unsoundness of institution-building and so on.

但是，自由贸易区的构建中还存在制度建设不完备、经济结构不合理、机构建设不健全等问题。

In current technology, similar injection has the disadvantages such as low content of effective components and unstability.

现有技术中，类似注射液存在有效成分含量低及不稳定之不足。

Taxol had many disadvantages as follows:(1) The toxicity and sensitization.(2) The unstability after deliquation.

紫杉醇注射液存在的问题有：溶剂的毒性、致敏性和稀释后的不稳定性。

Various pricing methods for telecom tariff are provided, along with an adequate comparison of the advantages and disadvantages of the 2 price control measures: return rate control and upper limit price control.

分析了电信资费的各种定价方法，且充分比较了回报率管制和最高限价管制两种不同管制方法的利弊。

During the rising of GC, against the main trend of the structural upgrade, unique disadvantages of different countries are being gradually diminished, and unique competitive advantage are gradually emerging. The analysis points out that the level of our country's GC is in an upper middle position in the world, but the public finance and fiscal policy still dictate the structure of GC. Our country's GC is in the preliminary stage of GC and the structural space for uplifting is still very great.

在政府竞争力的提升过程中，在结构升级的大趋势下，各国特有的劣势逐渐减少，具有自身特色的竞争优势逐渐凸现；分析指出我国的政府竞争力在国际上居于中等偏上的位置，但是从结构上看，仍以公共财政和财政政策为主导，处在政府竞争力的初级阶段，结构升级的空间仍然很大等。

In this article,we first introduce some common knowledge of controlled release;then we analyze the feasibility of utilizing various controlled release system on disinfectant and quality guarantee of potable water, and point out the advantages and disadvantages of util.

首先介绍了控制释放的一般知识，分析了各种控释体系应用于饮用水的消毒保质上的可行性，指出了这一技术在饮用水的消毒保质上应用的优点和存在的问题，并对其应用前景进行了展望。

If you have used a vacuum cleaner, you will find some disadvantages of a vacuum cleaner.

如果你们使用过吸尘器，你就会发现它的一些缺点。

According to the comparison of the advantages and the disadvantages of four implementing methods of the variable gain amplifier,the digital potentiometer is selected for the laser receiving circuit and its action process is analyzed.

比较可变增益四种实现方法的优缺点，在激光接收电路中选择使用数字电位器的方法实现可变增益控制，并分析其作用过程。

This paper compares the advantages and disadvantages of each method,and considers that Areal Interpolation Algorithm based on surface models is an appropriate method to the gridding of vector polygon and should be used more extensively.

同时介绍了各类算法的实现思想，并比较了其优劣及应用范围，认为基于表面模型的面积内插法是一种比较理想且极具发展前景的矢量多边形网格化方法。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。