主要原因

3Photosynthetic efficiency was sensitive to the increase of plant density, which mainly caused by the decrease of content of chlorophyll, photosynthetic rate, and carboxylation efficiency which were positive correlation to yield per plant, and the decline of quanta efficiency was subordinate

3叶片光合效率对密度增加的反应较敏感，叶绿素含量、光合速率和羧化效率的降低是主要原因，它们与单株产量呈显著的正相关，叶绿素、光合速率和羧化效率之间也呈显著的正相关，量子效率的降低是次要的

Hypertension has become a serious hazard to human health,is one of the cardiovascular diseases leading to death.

高血压已成为严重危害人类健康的疾病，是心血管疾病死亡的主要原因之一。

Stroke is the leading cause of adult disability, said Carmichael.

中风是**残疾的主要原因，Carmichael说。

"Playing in the Champions League was a massive factor in coming here" Carrick added.

"参加冠军杯是我来到这里的主要原因"卡里克补充说。

Aim To study the expression of CD44V6 and Cathepsin D in early and advanced gastric carcinomas, and their prognostic significances.

肿瘤的侵袭和有无淋巴结转移是恶性肿瘤致患者死亡的主要原因，探讨能评估肿瘤转移的指标，是研究肿瘤预后的关键。

One of the major causes of fear.

恐惧的主要原因之一。

One of the leading causes of this change is the Internet.

这一变化的主要原因之一是国际互联网。

Cauterization of steel store jar for oil was introduced including caused reason and mechanism,and concept on the protection with dope and cathode was put forward.

论述了钢制原油储罐腐蚀的基本情况，分析了引起腐蚀的主要原因，给出了腐蚀机理，提出了涂料和阴极保护联合防护的概念，重点介绍了锦州石油化工公司20000m3原油储罐中涂料的选择原则和长效综合防护对策以及它的应用情况。

The bottom of conduction band of CBO and BBO consists mainly of cation state.

依据能带计算的分析，阴离子集团〓在晶体中的链接是使得LBO和CBO的带隙大于BBO的主要原因。

It is understood that low price ceiling and limited choice are the main reasons for the cold reception of the appliances to the countryside policy.

据了解，最高限价低，产品选择范围窄，是家电下乡政策在中山受冷的主要原因。

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。