主要原因

Volumetric contraction in the process of compaction, in our opinion, is the main reason for this phenomenon.

笔者认为在成岩过程中沉积物可能发生的体积收缩应该是导致这种伸展率异常的主要原因。

The aim of the dissertation is to try to give a substantial evidence for the opinions of history comparative linguistics at language variation providing the individual cases and to try to make the elucidation: The main reason that language variation produce is to not only and only is a mutation of inner part system because of the language with regulation,...

力图为历史比较语言学在语言变异方面的论题提供一个可资佐证的个案，试图说明：语言变异产生的主要原因不仅仅是由于语言系统内部的突变和调节，一些外部因素诸如人们的民族语言心理态度、性别、年龄、经济的向心力等等也能在语言的变异中产生相当大的作用。

Vacuolar compartmentalization appears to be the source of tolerance of metal-accumulating plants.

金属离子在液泡中的区域化分布是植物耐重金属的主要原因。

This is mainly due to the lack of a complete legal system.

这其中的主要原因是缺乏完善的法律制度。

In an aromatic complex unit ,the main cause for decrease in hydrogen compressor load was scale formation in steam condenser .

芳烃联合装置凝汽器的结垢是氢气压缩机负荷降低的主要原因。

Based on Generalized Principal Component Analysis for driving force of landscape change , economic development factor,the increasing of population and subscriber number and the enlargement of per capita living space are the main reason.

通过对景观变化驱动力的全局主成分分析，认为经济发展因素、人口和户数的增加以及人均居住面积的扩大是导致农村居住等景观增加、村内空闲地减少的主要原因。

That is because the limitation effects of quantum well structure on the electrons and holes, and this structure could improve the composite probability of excitons in the light-emitting layer, thereby increasing brightness and efficiency of OLED.

实验结果表明适当周期数的量子阱结构器件的亮度和电流效率比传统的三层结构器件的要大，主要原因是量子阱结构对电子和空穴的限制作用，这种限制作用提高了电子和空穴在发光层中形成激子和复合的几率，从而提高了发光的亮度和效率。

Although Xing Yunlu's work did not go beyond the mathematic level of Shoushi Computus, it had showed that higher-level mathematics knowledge is also necessary for the scholars in the Ming Dynasty to develop the traditional calendrical astronomy, and the astronomers had provided with some necessary mathematics knowledge in the late Ming Dynasty.

邢云路的此项工作表明，在明代传统天文历法中仍然需要应用较高水平的数学知识，而且历算家也具备了一定的水准，而以往认为的明代天文历法研究没有向数学提出更高要求是导致明代数学发展衰落主要原因之一的观点是需要修正的，至少到明末时期已经随着对传统历法研究的深入而对数学提出了更高的要求。

The main reason why American mutual fund is so advanced is that there is the concerted mechanism environment for mutual fund, such as the mature financial market, sufficient investment capital supply, well-developed system of laws and so on. Adopting the specific exponents of Shanghai and Shenzhen Security Market, fund exponent yields, all weekly yields of mutual fund in specific periods, etc., the positive analysis of the coordination of Chinese mutual fund and Security Market demonstrates that this coordination is not ideal generally. On condition that the market characteristic of mutual fund is made clear, mutual fund can develop conceitedly and healthily by developing security market, increasing market efficiency, providing more fund, improving fund management, standardizing relative system of privately offered funds and so on, and optimizing the market environment to develop mutual fund.

美国开放式基金之所以发达，主要原因在于开放式基金具有协调发展的制度环境，如成熟的金融市场、充足的投资资金供给、完善的法律体系等；采用沪、深证券市场特定指数与基金指数收益率，及特定时期内所有开放式基金的周收益率等指标，对我国开放式基金与证券市场的协调性的实证分析发现，二者协调性程度总体上不理想；在明确开放式基金发展的市场过程性质的前提下，通过促进证券市场的成熟、提高市场效率、完善法律、拓宽基金资金供应渠道、完善基金治理结构、规范私募基金发展等配套措施，优化开放式基金发展的市场环境，才能不断促进开放式基金的协调、健康发展。

The protective policy of labor market and the wage rigidity are the key factors of the concomitance of full employment and structural unemployment.

劳动市场上的保护政策以及工资刚性是充分就业与结构性失业并存的主要原因。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。