错误的供电线路是房屋火灾的主要原因。
这次锐减是美国鱼类和野生动物管理局决定正式将这种鸟列为濒危物种的主要原因。
The crash was a major reason the U.S. Fish and Wildlife Service decided to formally list the bird as threatened.
她说，联合国文化组织没有投票宣布威尼斯成为世界濒危遗产地的主要原因是联合国教科文组织已经变得“极度政治化”。
She says the main reason the U.N. cultural organization didn't vote to declare Venice a World Heritage Site In Danger is because UNESCO has become "intensely politicized".
最后，2005年以来玉米价格暴涨的主要原因是对全球变暖的担忧，这一点被克鲁格曼轻易地漏掉了。
Finally, Krugman conveniently forgets that concerns about global warming are the main reason that corn prices have skyrocketed since 2005.
对不起，我的任务没完成。主要原因是我这星期有许多其他工作要做。
I'm sorry my assignment isn't finished. The thing is, I've had a lot of other work this week.
我订阅《新科学家》的主要原因是要跟上科学的进步。
My main reason for subscribing to New Scientist is to keep abreast of advances in science.
当然，侵蚀是造成其破坏的主要原因之一，但人类活动应承担的责任也越来越大。
Erosion, of course, is one of the key reasons for its destruction, but human activity is also increasingly responsible.
年轻人离开农村的主要原因之一是缺乏机会。
One of the main causes of young people moving away from the countryside is lack of opportunity.
他指出糖是导致蛀牙的主要原因，尤其是糖果、蛋糕和软饮中的糖。
He pointed out that sugar is a major agent in dental decay, particularly the sugar in sweets, cakes, and soft drinks.
地理信息的存储是1830年皇家地理学会（RGS）成立的主要原因之一。
The storage of geographical information was one of the main rationales for the foundation of the RGS in 1830.
一份报告称，羊年是2015年新生儿出生率低的主要原因。
The Year of the Goat was the main reason for the low newborns in 2015, a report said.
在雅典，尸体埋葬三年后就要被挖出的主要原因是用地不足。
Lack of space in Athens is the main reason why the dead are dug up after three years.
公共交通工具的便利将鼓励通勤者不使用他们自己的汽车，使用自己的汽车是许多城市交通拥堵的主要原因。
The convenience of public conveyance would encourage commuters not to use their cars, which is the primary reason for bad traffic in many cities.
她在职业生涯中期重返学术界的主要原因是有更多的自由来选择研究课题。
Her main reason for returning to academia mid-career was to take advantage of the greater freedom to choose research questions.
事实上，所有的专家都同意按服务收费的系统——医生的报酬取决于医疗服务的数量，而不是质量或效率——是医疗成本如此高的一个主要原因。
Virtually all experts agree that the fee-for-service system—doctors are rewarded for the quantity of care rather than its quality or effectiveness—is a primary reason that the cost of care is so high.
分析师说，墨西哥经济急剧下滑的主要原因是墨西哥经济与美国紧密相连，美国目前正陷入19世纪30年代以来最严重的经济衰退。
Analysts say the main cause of Mexico's nosedive is that the nation's economy is tied strongly to that of the United States, which is mired in the deepest economic downturn since the 1930s.
悲伤是我们哭泣的主要原因，但事实上，人们流泪后会感觉更快乐。
Sadness is our primary association with crying, but the fact is that people report feeling happier after crying.
如果气候变化才是森林火灾日益严重的主要原因，那么清除灌木丛本身是没有多大帮助的。
Clearing bush by itself won't help much if changes in climate are largely responsible for increasingly severe forest fires.
第二种，更有可能的解释是，古埃及极端干燥的气候是主要原因，因为干燥促进了有机遗骸的保存。
A second, more likely, explanation is that the extremely dry climate of ancient Egypt was largely responsible, given that dryness promotes the preservation of organic remains generally.
妇女在婚姻中不平等的一个主要原因是，在大多数情况下，男人仍然是主要的经济支柱。
A major part of women's inequality in marriage has been due to the fact that, in most cases, men have remained the main breadwinners.
经过生物工程改造的棉花种植场可以生产自己的抗棉铃虫杀虫剂，而棉铃虫是造成农作物歉收的主要原因，直到今年，棉铃虫的危害都很小。
Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year.
这种细菌——存在于泥土和水中，而非粪便——是造成“游泳耳”的主要原因，症状是耳朵发痒疼痛和红肿。
This germ—which is present in soil and water, not feces—is responsible for "swimmers ear", an itchy or painful inflammation of the ear.
纳多说，糖和加工食品是儿童糖尿病的发病率上升的主要原因。
Nadeau says sugar and processed foods are big contributors to the rising diabetes rates among children.
然而，由于工作时间过长而产生的精神和身体上的压力是人们对许多工作不满的主要原因。
The emotional and physical stress, however, that occurs due to hard working hours is a prime reason for a lot of the career for dissatisfaction.
吸烟是导致火灾的主要原因之一。
联合国表示，人类活动是造成这一现象的主要原因。
Human activity is the main reason for this, the United Nations (UN) said.
反对者称广场舞带来的噪音是他们反对广场舞的主要原因。
Haters say the noise caused by square dancing is the main reason why they are against it.
这个地方对我如此重要的主要原因是我的祖母。
The main reason why this place is so important to me is my grandmother.
一个主要原因是，他们的手中或周围总是有技术产品。
One main reason is that they always have technology products in their hands or around them.
使用11位数字的主要原因是我们拥有世界上最多的人口。
The main reason for using 11 digits is that we have the largest population in the world.
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