变形链球菌是引发龋病的主要病原因素。
Streptococcus mutans is the primary etiological agent of human dental caries.
近来研究表明牙周炎可作为多种系统性疾病的病原因素。
Recently different researches found periodontitis was one of etiological factors for many systemic diseases.
内动力因素中，中高纬度因素、青藏高原因素、边缘海因素和热带海洋因素可能最为重要。
Among the interior factors, the middle and high latitudes, the Tibetan Plateau, the marginal seas and the tropic oceans may be the most important ones that drive climate changes in the Qaidam Basin.
有几个因素已被援引来说明出生率降低的原因。
Several factors have been adduced to explain the fall in the birth rate.
现在，总结一下，在今天的课上，我们回顾了英语作为世界第一语言的流行背后的一些原因或因素。
Now, to sum up, in today's lecture, we have reviewed some of the reasons or factors that lie behind the popular use of English as the number one world language.
即使石油泄漏不是海豚死亡的直接原因，它仍可能是一个因素。
Even if the oil spill was not the direct cause of dolphins' death, it still could be a factor.
要找出这一现象的原因并非易事，因为它涉及若干复杂的因素。
It is no easy task to identify the reasons for this phenomenon which involves several complicated factors.
他指出，只有相对于初始的背景条件，才有可能将特定因素确定为特定历史事件的主要原因。
He points out that it is possible to identify specific factors as the primary causes of a particular historical event only relative to an initial set of background conditions.
基于这些原因，我们可以假设在神经发育过程中一定存在一个重要的随机因素，特别是在所有正常大脑的发育过程中确实也会发生错误。
For such reasons, we can assume that there must be an important random factor in neural development, and in particular, that errors must and do occur in the development of all normal brains.
就像任何这类研究一样，原因尚未可知，究竟是出于这一因素，还是那些不吃早餐的人本来就更容易增重。
As with any study of this kind, it was unclear if that was the cause—or if breakfast-skippers were just more likely to be overweight to begin with.
成本如此之高的另一个原因是行业协会具有约束性的所有权结构等限制性因素。
The other reason why costs are so high is the restrictive guild-like ownership structure of the business.
当然，随着年龄的增长，我们的大脑会出于很多原因而衰退，包括环境影响和遗传因素等。
Of course, our brains can decline as we grow older for lots of reasons including other environmental influences or genetic factors.
这种伪造现象的主要原因在于利润因素。
The main causes of this fakement phenomena lie in the factors of profit.
存在丰富的证据证明遗传因素是酗酒的部分原因。
Ample evidence exists to prove that hereditary factors contribute to alcoholism.
由于很明显的原因，这些因素一般不作为评估方法和工具的参数考虑。
For obvious reasons, these factors are generally not included as parameters in estimation methods and tools.
健康结果方面的差距有众多原因，但贫穷是最普遍的因素。
Gaps in health outcomes have multiple causes, but poverty is the most pervasive factor.
可能这仅仅是次要因素，而其他许多原因无疑也影响着女性在科学上的成功。
They may well be a minor factor, while there are plenty of others that undoubtedly affect female success in science.
一些人有遗传原因倾向，有些是因为环境因素造成的。
Some people are genetically predisposed, while others lean toward depression because of environmental factors.
大多数科学家现在认为双相情感障碍并没有唯一的原因——而是，许多因素集合在一起产生了这个疾病。
Most scientists now agree that there is no single cause for bipolar disorder—rather, many factors act together to produce the illness.
这就是当需要更新存放此类流程的模块时版本控制成为此类流程的重要因素的原因。
This is why versioning becomes an important factor for those types of processes when modules holding such processes need to be updated.
交易量少的一个更深层的原因是国家层面的因素。
国家需要进行卫生统计，以便查明人们的死亡原因以及导致疾病或损伤的因素。
Countries need health statistics in order to identify why people die or what causes illness or injury.
底特律三大汽车制造商的不幸受到如此关注，主要原因是各大有害因素共同作用，使之极为脆弱。
The woes of Detroit's Big Three carmakers have received most attention because of the toxic cocktail of factors that has made them especially vulnerable.
导致飓风活动增加的另外60%的原因来自其它因素。
Other factors would have caused the remaining 60 per cent of storm activity.
造成这种忧郁趋势的原因有一些地方性因素。
酒精依赖有多种原因，基因因素、生理因素、心理因素、社会因素都有影响。
Problem drinking has multiple causes, with genetic, physiological, psychological and social factors all playing a role.
此外，引起孕产妇死亡的原因很广泛，与社会经济因素密切关联。
Moreover, the causes of maternal mortality are broad and closely linked to social and economic factors.
此外，引起孕产妇死亡的原因很广泛，与社会经济因素密切关联。
Moreover, the causes of maternal mortality are broad and closely linked to social and economic factors.
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