主要原因

The problem is mainly caused by primary air pipe resistance property variation,which caused the excessive opening of movable blades,the primary fan is working on the condition of higher wind pressure and lower flow.The approaches to reduce the speed stalling of primary fan and preventive measures are put forwa...

主要原因为一次风管阻力特性的变化，使一次风机动叶开度过大，一次风机工作点处在高风压区低流量的工况点，是造成一次风机失速的主要原因，提出了运行中减少一次风机失速机率的处理方法及预防措施。

Of smokers thought that the main reason of smoking was annoyance or tiresomeness. 52.9% of smokers were willing to give up smoking because it did harm to health, and 23.3% of smokers were unwilling to do so.

吸烟者中有41.57％表示其吸烟最主要的原因为烦恼或无聊。52.9％的吸烟者表示愿意戒烟，其主要原因为吸烟有害健康，23.3％则不愿意。

Results:After the blood flow was restored by operation, 4 died in the postoperative early stage because of sudden cardiac asystole due to hyperkalemia; in the late stage, 6 died of multiple organ dysfunction syndrome socondary from acute renal failure.

结果：血流再通后早期死亡4例，主要原因为高血钾引起的心搏骤停；迟发死亡6例，主要原因为急性肾功能衰竭为首发器官衰竭的多器官功能不全综合征；治愈11例，其中，5例保存了双侧肢体，6例截去单侧或双侧下肢。

This paper discusses the main reasons why jadeite jade culture was developed in a short time during the middle-late Qing dynasty. It concludes that three main reasons precipitate the rising of jadeite jade culture; the influence of folk customs of the Manchu ethnic group, the power structure of royal estate, and development of aulic culture; the change of social values influenced by Western culture and the commercial development of the Qing dynasty.

文章讨论了导致翡翠玉文化在我国清代中晚期形成的主要原因，认为满族民俗的影响，皇室权力结构改变及宫廷文化的推动；西方文化传入导致的价值观念转变；清代商业经济发展等要素是导致翡翠玉文化能在较短时间内得以与和田玉文化并驾齐驱的主要原因。

Stroke is the third leading cause of death and carotid atherosclerosis is the leading cause of embolic stroke.

Imaging of Carotid Artery Stenosis|颈动脉的动脉Stenosis的成像中风是死的第3 主要原因，颈动脉的动脉粥状硬化是embolic中风的主要原因。

Corneal allograft is the most effective treatment for corneal blindness,but corneal graft rejective reaction is the main cause of corneal allograft. Corneal neovascularization is one of the most causes of corneal blindness and the high-risk factor of corneal graft rejective reaction.

研究背景同种异体角膜移植是治疗角膜盲最为有效的方法，而角膜移植排斥反应仍然是移植失败的主要原因；角膜新生血管是角膜盲的主要原因，亦是角膜移植排斥反应的高危因素。

The pathogenesis of asthma can be divided into three stages in immunology. The initial stage is sensibilization, which is closely associated with the activation of T cells. B7/CD28 and CD69 also play a significant role in this process. The second stage is chronic allergic inflammation. The immune dysfunction resulting from the disturbance of TH1/TH2 is a major cause of chronic allergic inflammation, and dominates asthma attack. And the third stage is airway remodeling due to chronic inflammation. Airway remodeling is one of the major causes of refractory asthma, which also contributes to the death from asthma.

哮喘的发病从免疫学角度可以分为三期：初期为致敏阶段，与T细胞激活关系密切，B7/CD28和CD69在这一过程也扮演重要角色；第二期为慢性过敏性炎症阶段，TH1/TH2失衡导致免疫功能紊乱是此阶段的主要原因，在哮喘发作过程中起主要作用；第三期为慢性炎症引起的气道结构重构阶段，是难治性支气管哮喘的重要发病和死亡原因。

When the relative soil water content were 55%-40%, the main reasons of the photosynthetic rate declined were stomatic limitation. When the relative soil water content were 20%, the main reasons of the photosynthetic rate declined were nonstomatic limitation.

干旱胁迫下，光合速率的下降是气孔因素与非气孔因素双重作用的结果：轻度干旱胁迫下（土壤相对含水量55%~40%）气孔限制是光合速率下降的主要原因，而严重干旱胁迫下（土壤相对含水量20%）非气孔限制是光合速率下降的主要原因。

Chronic diseases are the chief causes of death, and injuries and toxicosis lead to the premature death of young adults in monitoring point.

慢性非传染性疾病是构成监测点居民死亡的主要原因，损伤和中毒是构成监测点青壮年&早死&的主要原因。

The main reason there are: its own questions is the problem to weaken the effect of model education, the main performances criteria for the selection of model is unitarily, and integration is not enough, misunderstanding on publicity, and sustainable cultivate is not perfect.

榜样教育之所以出现这些问题，主要原因有：榜样教育本身存在的问题是榜样教育弱化的根本原因，主要表现有榜样的选择标准单一化、榜样的整合不到位、榜样宣传的误区、榜样培育不完善。

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。