由于

Below 60km, ionization is not due to the sun's ultraviolet and x radiation primarily, but to cosmic radiation.

在60公里以下，电离主要不是由于太阳紫外线和X辐射，而是由于宇宙辐射引起的。

The first-part of this paper evaluates the main stability theories concerned and concludes the conceptualization steps and essentials covering the various methods. Different disturbed-measure functions are studied in terms of their formulations and characteristics. Both Lyapunov functions and TEFs can be constructed only in a heuristic way of case-by-case. Ignoring changes in the disturbed-measure function's value after clearing the fault, Lyapunov functions and TEFs are applicable to neither nonautonomous one-machine infinite-bus systems nor any multimachine systems. Moreover, TEFs cannot guarantee the sign of errors because they don't satisfy the conditions for Lyapunov functions.

作为第1篇，文中归纳出这3种方法的共同分析步骤和要素，并比较各种受扰程度函数，指出：李雅普诺夫函数和TEF的建立都必须从具体模型出发并只能依靠启发的方式，它们没有考虑受扰程度函数的值在故障清除后的变化，因此既不适用于复杂模型的单机系统，也不适用于任何多机系统；又由于这2种方法都基于很强的假设，故分析的误差可能非常大，而TEF法更是由于不满足李雅普诺夫函数的条件而可能得到冒进的结果。

I draw people through the test, understand the different classes of children aged people in figure painting tests on the following characteristics: 1, small classes can not find child care because of the graphic match, the majority of child care both in the overall figures are still details to chaos The lines to express disorder. 2, Zhongban due to the continuous improvement of cognitive, has been able to find a match in the minds of the graphics, and has been in the minds of the graphic expression, but the details painted on the expression of often rough. 3, taipans child care whether or details on the whole, are more perfect expression, but the large class paintings by children of mothers are the embodiment of their own, can not distinguish between adults and children.

笔者通过画人测验，了解不同年龄班的幼儿在人物画人测验上有以下的特点：1、小班幼儿由于找不到匹配的图形，大部分幼儿无论是在人物整体上还是细节上都是用混乱无序的线条来表达。2、中班由于认知的不断提高，已经能在头脑中找到相匹配的图形，并将头脑中已有的图形表达出来，但是在细节描绘上表达的往往比较粗略。3、大班幼儿无论是在整体上还是细节上，表达的都比较完善，但是大班幼儿所画的妈妈都是自己的化身，不能区分大人和小孩。

Some circuits use resonant, quasi-resonant, and/or multi-resonant techniques. However, voltage or current stresses in these converters are higher and require the devices of higher VA rating. Some circuits use passive snubbers or active clamp techniques. However these converters become more complicate. Phase-shift ZVS technique has been used in bidirectional DC/DC converters since it can realize ZVS for all switches without auxiliary switches.

谐振、准谐振或多谐振技术方案，变换器的电压电流应力较高，变频控制增加了滤波器设计的难度；能量缓冲吸收电路或有源钳位电路方案，由于需要增加多个额外辅助元件，增加了变换器的复杂性；全桥相移技术方案，由于主电路无需增加额外元件，只需利用相移控制，即可实现软开关，因此引起关注。

It is suggested that the wrinkling is due to the large unsupported area at the draw wall during the stamping process, also, the side length of the punch head and the die cavity opening are different owing to the die gap.

它暗示起皱是由于拉伸过程中存在大的无支持区域，而且，冲子头部的边长和模腔的打开也由于模具间隙而不同。

Because of the enormous amount of sail related to the ships size, merchant sloops were very fast, but due to their small size they couldn't take large amounts of cargo.

由于帆的数量和船身大小的关系，商用单桅纵帆船的速度非常快，但由于他们较小的体积限制了他们不能携带大量的货物。

Because of the enormous amount of sail related to the ships size, merchant sloops were very fast, but due to their small size they couldn't take large amounts of cargo.

由于帆的数量和舟身大小的关系，商用单桅纵帆舟的速度非常快，但由于他们较小的体积限制了他们不能携带大量的货物。

Because of the enormous amount of sail related to the ships size, merchant sloops were very fast, but due to their **all size they couldn't take large amounts of cargo.

由于帆的数量和船身大小的关系，商用单桅纵帆船的速度非常快，但由于他们较小的体积限制了他们不能携带大量的货物。

Because of the enormous amount of sail related to the ships size, merchant sloops were very fast, but due to their small size they couldn't take large amounts of cargo.

单桅纵帆船由于帆的数量和船身大小的关系，商用单桅纵帆船的速度非常快，但由于他们较小的体积限制了他们不能携带大量的货物。

Because of the enormous amount of sail related to the ships size, merchant sloops were very fast, but due to their small size they couldn't take large amounts of cargo.

单桅纵帆船游民星空由于帆的数量和船身大小的关系，商用单桅纵帆船的速度非常快，但由于他们较小的体积限制了他们不能携带大量的货物。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。