主要原因

Pointing out that the main of that causes are the influence of their native language and the incompactness of the regulations in teaching process.

本文还对省略偏误产生的原因进行了分析，指出母语影响以及教学中规则不细化是主要原因。

The grains of semi-solid billet isothermally reheated over liquidus temperatures 640 and 650 ℃ are much finer than those at solidus-liquidus zone temperatures 620 and 630 ℃, but the spheroidization degree is slightly lower.

组织演变机理分析表明，提高等温温度，液相形成速度加快导致晶粒合并受到一定的抑制是晶粒细化的主要原因，而保温时间的缩短则是晶粒球化程度降低的原因。

Local defects in bone as a result of trauma, neoplasm, infection, or congenital diseases are usually filled in and repaired with autografts The fresh autografts are considered to have the highest osteogenous capacity and no immune reaction.

外伤，肿瘤或感染施行骨切除或某些先天性疾病等原因引起的骨缺损常用自体骨填补，修复，其主要原因是自体新鲜骨成骨能力好，无免疫排斥反应。

Combining the available regional geological and geophysical research, the petrogenesis of the magmatism was studied. As a response and absorption to the IndiaAsia collision, the northeastward flow of the asthenosphere beneath the Tibetan Plateau along the 400 km depth interface was blocked by the North China craton, and caused a systemic sequences in West Qinling Region, including the strikeslip fault systems and pullapart basins in the shallow crust and the origin of the twotype magmatism in this work in deep lithosphere. This explanation is consistent with the lithology and plumelike geochemical features of the kamafugite and potassic trachybasalt, which are significantly different from the potassic magmatism within the plateau and its adjacent regions.

结合前人对该区深部地球物理和断裂构造的研究，论证了火山岩的起源与成因，指出作为对印度-欧亚大陆强烈碰撞的吸收与调节，高原下软流圈地幔流沿400 km界面向北东方向的侧向流动以及西秦岭周边克拉通块体的阻挡，是形成西秦岭断裂系左行走滑特征和巨大拉分盆地的主要原因，也是导致西秦岭新生代两类钾质火山岩和碳酸岩起源与成因的动力学机制，较好地解释了西秦岭新生代岩浆作用起源深度大，具有地幔柱源的地球化学特征，岩石组合与地球化学有别于高原内部及其周边地区新生代钾质火山岩的原因。

The introduced techniques include changing the state of firebox in lamellar sample and the state of the sample in firebox, changing oxygen pressure in firebox and adjusting operation mode of rotating key which controls the electrical current of portfire.

该文分析了燃烧热测定实验常见的失败原因，并针对其中的主要原因，提出了 4点改进方法，即改变燃烧丝在片状药品中的状态和位置，改变药片在氧弹内坩埚中的状态，改变氧弹内氧气的压力值和改变点火电流控制转钮的操作方式。

It is considered that the defects of vacuum pugged body are attributed to improper mud hardness,pugmill cylinder shape, core connection and parameters of electric preheating.

结合生产实际，对造成110kV SF6瓷套真空细练泥段变形和开裂的原因进行了分析，认为粗练泥段的硬度、工艺筒和芯轴的连接方式及电阴干工艺是造成真空细练泥段缺陷的主要原因。

Fire and human activities increased the domination of oak forests because of their biological features of oak trees. Cutting repeatedly was the main reason for the domination of Quercus mongolica forest in recent 100 years in north and east China. During the succession of ...

火是原生性质蒙古栎林在地质历史时期存在和扩散的根本原因，过度的人类活动是促成现在蒙古栎次生林占优势地位的主要原因，这是由蒙古栎这个树种的生物学特性决定的，在没有外界因素的干扰和火减少的情况下，蒙古栎在演替过程中逐渐被耐荫的树种所取代，但是在中国北方，由于人类活动的加剧，蒙古栎林的优势度有增加的趋势。

"Cataract is the main cause of low vision and blindness in the world," write Liam Smeeth, from the London School of Hygiene and Tropical Medicine in the U.K., and colleagues."Any common exposure that increases the risk of cataract is thus of great public health importance."

伦敦医事学校的Liam Smeeth表示，白内障是造成视力不良和失明的主要原因，所以若有任何可能会增加白内障风险的任何原因都具有重大的公共卫生重要性。

I don't agree with Neil Irwin that any of the reasons he gives in his article in the Washington Post are the main reasons why Americans are sourer about the economy than looking at the numbers might lead you to believe they should be.

Neil Irwin 在华盛顿邮报上的一篇文章解释了为什么美国人通过数字来使经济问题严重化的主要原因，这些原因可能会让你觉得美国人就应该那样，不过，我对此不太赞同。

The result shows that its surface spalling is mainly attributed to over loading .

利用光学显微镜和扫描电镜对8 5 Cr2 MoV轧辊表面剥落原因进行了分析，结果表明，外力过载是主要原因。

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。