However, researchers have not identified just what those causes might be.

VOA: special.2009.01.06

The Washington Post surveyed its readership and discovered that ask people what they thought was the most significant causes of the shooting.

华盛顿邮报》在读者中进行了调查,并且发现当询问人们,他们认为,枪杀案发生的主要原因是什么。

麻省理工公开课 - 媒体、教育、市场课程节选

The contract has to specify what are the causes of, let's say, death or a situation in which one is covered.

合约中必须指明,合约建立目的，比如说，死亡或者承保的是什么情况。

耶鲁公开课 - 金融市场课程节选

Scientists are still not sure what causes Alzheimer's disease.

VOA: special.2009.09.15

Now let's look at what the present day holds the leading causes of death now and this is probably something that you'll also know.

我们再来看看如今的,主要死亡原因,这个你们大概也都知道

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Doctors do not know what causes this process.

VOA: special.2009.01.06

That's what causes her to have the curiosity to go backstage.

这正是她有去后台，的好奇心的原因。

耶鲁公开课 - 1945年后的美国小说课程节选

Scientists are not sure what causes tension headaches.

VOA: special.2010.03.30

And he claimed it causes an unpleasant emotional state, what he described as "dissonance."

他认为这会让人进入一种情绪不安的状态，他称之为“失调”

耶鲁公开课 - 心理学导论课程节选

Doctors do not know what causes asthma.

VOA: special.2009.07.28

We might wonder what causes it.

我们会想这个的原因是什么。

耶鲁公开课 - 死亡课程节选

Experts are not sure what causes lupus.

VOA: special.2009.04.14

to causes of death in the world, to illustrate that what happens in the world around us in the U. S. isn't necessarily the same asin the U.S. isn't necessarily the same as what happens in other places around the world.

而是关于世界上所有人的死因,它说明同美国的情况相比,世界其他地区的情况,有所不同

耶鲁公开课 - 生物医学工程探索课程节选