主要原因

The defect of cell cycle control is usually caused the development of tumor.

根据研究指出，细胞周期调控的缺失是造成癌症发生的主要原因之一。

On the basis of production experience, the main reason for the system fouling during the oxidation of cyclohexane is discussed, and methods to prevent the fouling are introduced.

根据生产实践经验，论述了环己烷氧化过程中系统结渣的主要原因，及对结渣问题采取的措施。

The experiment showed that it was difficult for Cynodon dactyl on overwintering because of serious lipid peroxidation in cell membrane, the enzyme activity and resistance declined at low temperature.

说明在低温胁迫下，狗牙根叶片细胞膜脂质过氧化较严重，酶活性降低，抗性下降，这是狗牙根越冬困难的主要原因。

The main reason for the slump is the darkening outlook for the world economy.

油价下滑的主要原因是世界经济暗淡的前景。

This article thus concludes Darwinian methodology is one of the main reasons for evolution controversies.

达尔文的方法论是产生进化论争论的主要原因之一。

The main reason of deactivation of catalyst is that the active centers are covered by organic substances.

催化剂的的活性下降的主要原因是催化剂的活性位被有机物覆盖。

The main reason of the catalyst deactivation was the loss of the active components.

活性组分流失是催化剂活性下降的主要原因，而积炭对催化剂的活性影响不大。

The main reason for this problem is a legal deficiency, the Government environmental responsibility to be a dead letter.

针对此问题的主要原因是法律的不足，政府的环保责任成为一纸空文。

The main reason why this 2.4-stroker engine is such a perfect combination is the stroke of the K24 crankshaft in conjunction with the H22a's connecting rod center to center length and dead-on piston height matches perfectly with the F20C's deck height, Castillo said.

主要原因是这2.4loken引擎是如此的完美结合，是中风的k24曲轴一起h22a的连杆中心距长度和死对活塞比赛高度完美配合该f20c的甲板高度，卡斯蒂略说。

This debilitating disease is the leading cause of blindness in individuals over 55 years of age.

这种眼疾是导致55岁以上人士失明的主要原因。

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。