主要原因

Being the main reason of sensorineural hearing loss,the mechanism of aminoglycoside antibiotic\'s ototoxicity has been researched in many aspects,such as morphology, protein expression,gene regulation,and electrophysiological etc.But,most of those researches are focus on inner/outer hair cell,cochlear striae vascularis and spiral ganglion neuron.

在我国，氨基糖甙类药物导致的听力损失位居各种致聋因素之首，作为引起感音神经性聋的主要原因，学者们从形态、蛋白质表达、基因调控、电生理记录等各个方面对其耳毒性机理进行了大量研究，但研究主要集中在耳蜗的内、外毛细胞、血管纹、螺旋神经元部位。

Objective:To evaluate treatment method, result and main cause of failure and prognostic factors of tonsillar Non Hondgkin's lymphoma.

目的 ：分析扁桃体非霍奇金淋巴瘤的治疗方法、治疗效果及治疗失败的主要原因，并探讨影响预后的主要因素。

It shows that the Taiwan topography influence on the movement and the central air pressure is salience. The topography force influence on the typhonic central intensity and unsymmertrical structure is very evident. The Taiwan topography is the primary reason for the low pressure in the windward mountain and high pressure in the leeward mountain. The topography is the primary reason for the peripheral precipitation reinfor4ce of the typhoon.

试验结果表明：台湾岛地形对台风&泰利&的移动路径和中心气压的影响不显著；地形的强迫作用对台风涡度场的中心强度和非对称结构有明显的影响；台湾岛地形是形成迎风坡诱生低压和背风坡诱生高压的主要因子；地形是台风外围降水加强的主要原因。

The unrational structure of ceramic burner and the reduction of gas thermal value lead to its deficiency in capacity is demonstrated by theory analysis and model experiment.

通过理论分析得出了煤气热值下降和陶瓷燃烧器的结构不合理是导致套筒式陶瓷燃烧器能力不足的主要原因，模型实验证明了燃烧器的结构是其主要因素。

Under the three body abrasive wear, the cutting is main reason of wear of the hard materials (3M and 2M). It is an important wear form of material 4M and several austenitic manganese steel at high load condition. b. The plastic materials form the block debris after deforming many times, forming the block-shape debris is the major waar form of this kind of material under several given wear conditions.

在三体磨粒磨损条件下，切削是造成编号为2M和3M等硬质材料磨损的主要原因，也是4M和几种奥氏体锰钢在高载荷下磨损的重要形式；块状屑的形成是塑性较好的材料在各种磨损条件下磨损的主要形式。

Objective: Parkinson's disease , a parapymmid progressive neurodegenerative diseases in centre nerve system , always invades middle-ages and older people and cause their disables.

目的 帕金森病是一种常见的缓慢进展的中枢神经系统变性疾病，主要见于中老年人，是中老年人致残的主要原因之一，随年龄增长其患病率逐渐增高。

While Mr Li has only one reason to promote American English, we will face it off with the following ten points to promote the Queen's English

李先生倡导美国英语只有一个主要原因，而我们倡导英语普通话却是基于以下十个主要观点和依据

Based on parameter of softening point,aging kinetics model was established to show aging condition of two asphalts and to calculate activation energies.

一般认为沥青吸收空气中的氧气反应是引起是沥青老化的主要原因[2]氧化过程主要与温度、时间、沥青膜的厚度、沥青的组成和结构有关[3]。

Analysis of chiru food plants showed no marked difference in nutritive values at this season between the calving grounds and the southern range.

我们对藏羚羊主要采食的植物的营养成分进行分析，没有发现这个区域和其南部其他区域的差异，所以食物可能不是藏羚羊迁徙的主要原因。

The main conditions necessary for Agate formation are the presence of silica from devitrified volcanic ash, water from rainfall or ground sources, manganese, iron and other mineral oxides that form the white, red, blue, grey, brown or black bands.

玛瑙的主要成因是各类火山灰中二氧化硅、雨水或地下水、锰、铁或其他矿石氧化物共存反应所致，也是玛瑙具有白、红、蓝、灰、褐或黑色多姿多彩纹理的主要原因。

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。