主要动力

Polyploidization and the accumulation of transposable element are the primary contributors to genome expansion.

文章综述了植物基因组大小差异以及引起这种差异的主要进化动力的最新研究进展。

In order to overcome the shortage of the uncontrollability of the SFD behaviour, the steady state and the acceleration response of rotor-controllable parameters conical squeeze film damper system are studied in the third part.

为了克服SFD特性不可控之不足，第三部分主要研究了结构参数可控的锥形挤压油膜阻尼器-转子系统的动力特性。

The result shows unsymmetrical dynamics of bearing in two directions is the main reason for the above phenomenon.

研究结果表明：轴承垂直、水平两个方向动力特性的差异是造成上述现象的主要原因。

Pregnancy ratewas significantly higher in women receiving 1 to 3 cycles of treatment than those receiving more than 3 treatmentcycles. Conclusion: Pregnancy rate after IUI was related to thickness of endometrium,time of IUI, diameterof fallopian tubal ampullae,density and motility of sperm after washing.

影响IUI结局的主要因素是：子宫内膜的厚度、IUI治疗的时机、输卵管壶腹部的直径、输卵管伞端距宫角的距离、洗涤后精子的密度和动力。

Colligating the main viewpoints about Technology Park s connotation, Technology Park is an industry-centralizing district which core body is high-tech enterprise, which primary object is to develop high-new science and technology industries by creating local optimized condition, and which inherent motivity is cooperating innovation.

综合国内外学者关于科技园区内涵的观点，科技园区是指以高科技企业为核心主体，以通过创造局部优化的区域环境发展高科技、实现产业化为主要目的，以协同性创新为内在发展动力的产业集聚区。

The main characteristic contents are as follows:(1) Strains, displacements, reaction of soil, natural frequencies and main mode shapes et al are examined in the static and dynamic experiments of slabs on foundation and doweled slabs of concrete pavement.

1进行了混凝土地基板、接缝板的静、动力试验，主要测试内容包括应变、挠度、土基反力、频率、主振型等，从中得出了一些有意义的结论。

That restyling is expected to be primarily focused at the front of the car, with a focus on giving it an edgier, more up-to-the-minute look, however, the new look may be joined by a greener powertrain as well.

这restyling预计将主要集中在前面的汽车，把重点放在给它一个尖锐，更多的是一分钟的外观，然而，新的期待可能会加入的环保动力系统，以及。

Designers will be primarily focused on giving it an edgier, more up-to-the-minute look, however, the new look may be joined by a greener powertrain as well.

设计者们将主要侧重于给它一个尖锐，更多的是一分钟的外观，然而，新的期待可能会加入的环保动力系统以及。

The main construction projects of the company are Iron Making Plant, Steel Making Plant, Steel Rolling Plant, Motive Power Plant, Freighting Railway and Public and Auxiliary Facilities. With coverage of 690,000 ㎡, more than 3,000 working stuff including 580 professional technicians and total assets of 3 billion RMB,the

公司主要建设项目有炼铁厂、炼钢厂、轧钢厂、动力厂、铁路货运专线及公辅设施等，占地面积69万平方米，从业员工3000余人，专业技术人员580人。

Straw checkerboard comprise of power system, portrait straw infixing system and landscape orientated straw infixing system. Among them, landscape orientated straw infixing system is the most difficult part in this project, which contains straw transporting、 straw exchanging、 cutting、 straw infixing、 automatic lift and needs high consistency and balance among these systems.

草方格铺设机器人主要由动力部分、纵向插草机构、横向插草机构等机构组成，其中横向部分是整个项目的难点，它由输草、换草、剪切、插草、自动起降等机构组成，机构之间工作要求具有高度的一致性和协调性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。