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More and more evidence supports that RNAi,co-suppression in plants, and quelling in fungi shares the same basic molecular mechanism. It indicates that this mechanism was acquired during early evolution.

目前的研究表明，RNA干涉与植物中的共抑制、真菌中的基因压制很可能具有共同的基本分子机制。

All these urge us to research the development mechanism of electronic government, which is also the stand of this dissertation. The development mechanism of electronic government refers to the fact that every factor in the whole system contacts one another, reciprocates and restricts one another, by which the whole system grows step by step.

电子政务发展机制是指组成电子政务系统的各个构成要素之间相互联系、相互作用、相互制约，推动整个系统从低级向高级、从初级电子政务向更高水平的电子政务发展的条件和功能，它存在于电子政务发展的全过程。

This paper introduces and studies the secure mechanism of iFIX in the field of industry control.We anal-ysis the relationship between users,user g roups,security areas and application features.We also show some shortcoming of iFIX security mechanism.

本文介绍和研究了工业控制领域中iFIX的安全机制，分析了用户、用户组、安全域和应用属性及其相互关系，同时阐述了iFIX安全的一些局限性，在此基础上提出了基于iFIX的工业控制网络三层安全模型。

As an exploration device of entrepreneurship and innovation, long-term incentive sharecropping contract is the main institutional arrangement which ensures the allied entrepreneur mechanism function well;(2) The growth of hi-tech enterprise clusters and entrepreneurial coordination mechanism for entrepreneurial linkages.

高科技企业作为一种创新和企业家精神的开发装置，分成合约和长期激励合同是其主要的制度安排，这些制度对于确保以技术专家、企业家与风险投资家为主体的联合企业家机制的发挥起着重要作用。

If bearing stratum are coarse soils, such as sand especially gravel and weathered rock etc, the failure pattern is compress mechanism, not as the sheafing mechanism of a the common cast-in-situ bored pile. In the meantime, the strength of pile material may govern the beating capacity of cast-in-situ bored piles with grouted toe.

文中对不同桩底持力层桩底灌浆桩的破坏模式进行了讨论，认为当桩底持力层为细砂层、中砂层尤其是砾卵石、强风化岩时，其破坏模式为桩底土的压缩破坏，同时桩身材料强度也可能成为桩的竖向承载力的控制因素。

Oxygen plays critical roles in lubrication mechanism. Oxygen affects the lubrication mechanism of additives all along, whether in sulfurized vegetable oil fatty acids containing active element or not in hydroxy vegetable oil fatty acids with pure carbon, hydrogen and oxygen not containing active element.

氧元素在润滑机理中有着关键作用，无论在含活性元素的硫化植物油脂肪酸，还是在不含活性元素的纯碳、氢和氧的羟基植物油脂肪酸中，氧元素始终影响着添加剂的润滑性。

The overloading mechanism of Perl 5 has been superseded by Perl 6's multiple dispatch mechanism.

Perl 5 中的重载机制将被 Perl 6 中的多重分派机制所取代。

On the basis of the equivalent mechanism of swinging movable teethed transmission-crank-rocker mechanism, the tooth profile equation of central gear was derived by the use of complex numbered vector method.

基于摆动活齿传动的等效机构－曲柄摇杆机构，利用复数矢量法，导出了中心轮的齿廓方程。

The mechanism of the changes of blood and milk parameters of the sows fed alfalfa meal and fat as well as the mechanism of the interaction of the alfalfa meal with other nutrients need further study.

添加一定比例的苜蓿草粉和定量脂肪，导致血液、猪乳脱脂乳清理化成分发生上述变化的机理，以及苜蓿草粉与其它营养元素的相互作用机理等仍有待于进一步加以研究。

The assembly of journal and plain bearing liner space is too little, force of organic still oil pressure is small it is the crucial index that affects lubricant result, make lubricate because of lacking engine oil between crankshaft and plain bearing liner and bite dead invalidation, include to be pulled badly, lack lube, layer of alloy of dry attrition generation is fused, grind sliding surface to did not maintain the oily film of certain ply, and all sorts of local overload exhaustion are destroyed, cavitation erosion and V form are destroyed etc, through technology of him director diesel locomotive old experience reachs the analysis of pair of its breakdown reasons, put forward precautionary measures especially. As a result of,the burns caustic mechanism plain bearing liner to burn caustic mechanism of 1 plain bearing liner is the lube film burst between journal and plain bearing liner, cause plain bearing liner and crankshaft generation clash, below high temperature, high pressure and high rotate speed, the wear-resisting alloy layer of plain bearing liner wears away prematurely or fuse, cause plain bearing liner and crankshaft to stick thereby bite, can make the steel back of plain bearing liner and Kong Zhong produces whirligig, inlet port is jammed, carry on the back by steel again with the friction of aperture causes high temperature to make plain bearing liner burned-out further, can cause bolt to break off, happen swing a malign accident that pounds cylinder body of bad internal-combustion engine.

轴颈和轴瓦的装配间隙太小，还有机油压力低是影响润滑效果的关键指标，使得曲轴和轴瓦之间因缺少机油润滑而咬死失效，包括严重拉伤，缺少润滑油，干摩擦产生合金层熔化，磨滑面没有保持一定厚度的油膜，以及各种局部过载疲惫破坏，气蚀和V形破坏等，通过本人主管内燃机车技术多年经验及对其故障原因的分析，特提出预防办法。1轴瓦的烧损机理轴瓦烧损的机理是由于轴颈和轴瓦之间的润滑油膜破裂，导致轴瓦和曲轴产生摩擦，在高温、高压和高转速下，轴瓦的耐磨合金层过早地磨损或熔化，从而引起轴瓦和曲轴粘咬，会使轴瓦的钢背和座孔中产生旋转运动，进油孔被堵塞，再由钢背和座孔的磨擦进一步引起高温使轴瓦烧坏，并会造成螺栓折断，发生甩出捣坏内燃机缸体的恶性事故。

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。