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Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

For these children to develop to their full adult potential, their education must be adapted to those differences.

为了让这些孩子发展其全部的成人后的潜能，他们的教育必须适应这些不同。

Results There were differences in shape and layers of velamen cell, number of xylem bundles, maximum diameter of vessels, organization of pith, as well as the types, quantity, and size of crystals. D. fimbriatum could be distingushed from its adulterant species D.

结果根被细胞的形状及皮层厚度，中柱的木质部束数、导管的直径、髓的构成，晶体的类型与大小存在种间差异。

In one hand, in the progress of children"s socialization, television medium, instead of family and schools, play the role of advancer in some extent. In another hand, because of television programs" different qualities, there are a lot of differences in different childrens moral, communication, studying and entertainment. The fifth part show the conclusion of this paper.

通过研究发现，电视媒介对农村留守儿童的道德状况、社会交往、学习及休闲等方面产生了双重影响：在农村留守儿童社会化的过程中，由于家庭的缺位，学校教育的补位不足，使得电视媒介在其社会化过程中充当了桥梁和伙伴的角色：然而，电视媒介内容的良莠不齐，导致农村留守儿童呈现出的道德水平落差大、社会交往能力差、学习成绩两极以及休闲活动盲目化等特征，指出电视媒介在农村留守儿童社会化过程中所起到的重要作用。

The results showed that the time for reading casual sentence was much longer than that of adversative sentence, but there was no differences between the reaction time of probe words in this two different levels.

实验一在句子层面考察因果和转折关系的理解差异，结果发现被试阅读转折句的时间显著长于因果句，但对两种句子中探测词的反应时没有差异。

Do you know how the differences between AE and BE come into being?

你知道美式英语和英式英语的差异是怎样形成的吗？

In part Three, on the basis of the theory of Chomsky "principle parameters", we compare the syntactic similarities and differences of passive voices among English, French and Chinese. The passives in all these three languages comply with the following principles. 1 Affectedness of entity.

英语、法语和汉语的被动语态虽然有一些相似，但是它们的差异还是主要的，本文认为在外语习得中，相似性较易被人接受，差异性却是外语学习者的难点，不容忽视。

This treatise uses TFA concept and its analytic method to discuss the differences and characteristics of the presupposition,entailment and affirmance.

文章运用TFA概念和分析方法，探讨预设、蕴含和断言之间的区别及运作特点。

From the angle of TFA,the treatise analyzes the semantic and pragmatic properties of the internal part of these linguistic expressions as well as the meaning and relationship of the examples,and to understand the specific differences between presupposition and entailment,entailment and affirmance,and the relationship between presupposition and context.It might...

从TFA视角，解析例句的预设、蕴含和断言之间的意义及关系，深入句子内部分析话语的语义特征和语用特征，了解严格意义上的预设与蕴含、蕴含与断言之间的区别，及预设与语境之间的关系，使识别真正意义上的预设成为可能。

We concentrate on the different pronunciations of stop and affricative initials in MC and in today's Min dialect and conclude that the differences result from the overlapping of many phonetics levels during the evolution of Min dialect.

通过分析古全浊声母中的塞音、塞擦音字在现代闽语的读音异同，结论认为这是闽语自身演变的多种语音层次叠置的结果。

I can do simple painting, carpentry and plumbing.

我能做简单的油漆、木工和修水管等工作。

The motivations, notations and outline of this work are also given in this chapter.

从这个意义上讲，这些时滞是无害的。然后用实例说明这三个定理的应用和互不包含性。