无系统的

The applications of chromosome numbers and basic numbers in pteridophyte systematics are reviewed in detail. The significance of karyotype analysis, polyploidy, pogamy, and reticulate evolution in pteridophytic classification, evolution, and phytogeography is also reviewed.

文中论述了蕨类植物染色体数目和染色体基数在系统学上的应用以及蕨类植物染色体组型分析、多倍化、无融合生殖、多倍体复合体及网状进化的研究概况。

Using data of daily load prediction, theory analysis and calculate of reactive optimal control have been tried.

运用系统日负荷预测的数据，尝试性地进行无功优化控制的理论分析，并进行了实例计算。

The principle of Electric Vehicle energy feedback is studied.

在研究能量回馈原理的基础上，设计混合励磁无刷电动机在汽车制动过程的能量反馈控制系统。

In power system, the voltage pulsation and deficiency or surplus of reactive power will have a great effect on the quality of electric power supply.

在电力系统中，电压的波动和无功功率的过剩和不足会严重影响供电质量。

On Power System Reactive Power Optimization of theses, papers to the use of a continuous quadratic programming method.

详细说明：关于电力系统无功优化的学术论文，改论文使用了连续二次规划的方法。

In theory and practical application, the study to reactive power optimization of power system is of great significance.

因此，对电力系统无功优化问题的研究，既有理论意义，又有实际应用的意义。

Reedy have announced the release of their all-new sensorless Micro Brushless System comprising of motors and ESC.

芦苇已经宣布释放其所有新的微型传感器组成的无刷系统电机和ESC 。

Alliteration, inversion, etc. In a word, simulating the forms of the source language poems does not only bring us the joy of dancing in fetters, but also explores the representability of the target language.

当然，既然不同语言系统在外观上似无共同之处，我们不可能处处照搬，但其中必有相通的道理和规律可循，理应可以做到哪怕是部分的平行对应，例如行数、音节数、节拍数、韵式，甚至头韵、倒装等。

And although the Group of Seven rich countries has largely been replaced by the Group of 20, which includes the systemically significant emerging markets, so far it has not distinguished itself. At the G20 meeting in Washington in November 2008 the global governance rhetoric rose to fever pitch.

尽管七国集团(G7)在很大程度上已被20国集团(G20)（其中包括具有系统重要性的新兴市场国家）取代，但迄今为止，两者本质上并无多大区别。2008年11月在华盛顿召开的G20会议上，人们狂热地谈论全球治理。

As Ethernet Passive Optical Network is one of the most effective ways for broadband access, it is important to set up a stable and effective network management system.

以太网无源光网络是宽带接入的最有效方式之一，为其建立一套稳定、有效的EPON网络管理系统显得尤为重要。

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。