导致视力下降的主要原因有两个：花在室内学习的时间太多，花在户外玩耍的时间太少。
Two main reasons can cause poor eyesight: too much time spent indoors studying and too little time spent outdoors playing.
巧克力短缺的主要原因有两个——巧克力越来越受欢迎，以及制作巧克力的植物可可产量减少。
There are two main causes of the chocolate shortage—chocolate's growing popularity and less production of cocoa, the plant from which chocolate is made.
这件事很重要，主要原因有两个。
主要原因有两个。
人们应该将自己继承的语言传递给孩子，主要原因有两个。
There are two major reasons people should pass their heritage language onto children.
引发肾结石的主要原因有两个：久坐和饮食中缺乏纤维素。
Kidney stones are known to be caused by a sedentary lifestyle and a low-fibre diet.
其主要原因有两个，第一个在于对冲基金活动的巨大规模。
农民人均纯收入增长率的变化总趋势是上升的，但上升速度较慢，主要原因有两个。
The farmers' average net income tends to increase but at a slow speed, which results from two reasons.
造成大气污染的主要原因有两个：一是燃煤锅炉排放的烟尘、二氧化硫和氮氧化物；
There are two main reasons for air pollution: First, the coal burning boiler emissions, like dust, sulfur dioxide and nitrogen oxides;
随着Flex的成熟，我相信您将看到越来越多的开发人员开始编写自己的定制Flex组件，主要原因有两个。
As Flex matures, I believe you'll see more developers begin writing their own custom Flex components for two reasons.
在粗略的使用了一下新站点后，我可以非常自信的说，如果有什么网页邮箱应用非常值得你用的话，这就是一个。主要原因有两个：它提供缓存和搜索两大功能。
After using the new site briefly, I can confidently say if I had to use a web-based Email application, this would be the one, for two big reasons: Caching and search.
如今英国老年人护理危机有两个主要原因。
Today's crisis in care for older people in England has two main causes.
有两个主要原因。
如果透过那些我参与的(包括收购我的合伙人，我也痛感亏损)看，有两个主要原因。
Well if I look at the ones I've been involved in (including deals my partners led but where I Shared the pain of loss) there are two primary reasons.
有两个主要原因使心跳保持高于最小值。
There are two primary reasons for keeping the heartbeat above the minimum.
我认为有两个主要原因。
这个案例研究中选择Linux有两个主要原因。
Linux was chosen for this case study for two primary reasons.
这种困惑似乎有两个主要原因，它们都可有助于解释为何没有清晰的目标。
There appear to be two primary reasons for the confusion, both of which may also help explain why there's no clear objective.
在我看来，这些变化有两个主要原因。
In my point of view, there are two major reasons for the changes.
这件事很难证实，主要原因是上述每一个范畴都是有争议的，而且有时候两个地方(例如北爱尔兰和斯里兰卡)的情况天差地别。
This is a difficult thing to prove, not least because each of those categories is controversial and there is a world of difference between, say, Northern Ireland and Sri Lanka.
我认为有两个这种现象的主要原因。
我认为有两个主要原因。
钢筋混凝土结构裂缝的成因是复杂的和多方面的，主要原因有以下两个方面。
The reasons for the crack of concrete structure are complicated and many sided, but the main cause is following two sides.
有两个主要原因带来了这次出口增长，首先是中国市场需求的增长，其次是本年度实行一般许可证后棉花出口的下跌。
There are two major reasons for the likely rise in exports - the demand from China and cotton exports falling under the Open General Licence from the current season.
似乎有两个主要原因：任务是否艰巨，任务是否是被指派的。
There appear to be two major factors: whether the task is hard and whether it's assigned.
从历史上来看，这样的变化是非常大的。出现这一变化有两个主要原因： 饶。
This adjustment — enormous in the history of such things — occurred for two key reasons.
创建自定义配置文件提供程序有两个主要原因。
There are two primary reasons for creating a custom profile provider.
这是非法的，有两个包包含同一单位在同一项目中所使用的编译器，因为这会引起歧义。这个问题的一个主要原因是不良的定义的程序包集。
It is illegal to have two packages which are used in the same project containing the same unit since this would cause an ambiguity for the compiler.
这是非法的，有两个包包含同一单位在同一项目中所使用的编译器，因为这会引起歧义。这个问题的一个主要原因是不良的定义的程序包集。
It is illegal to have two packages which are used in the same project containing the same unit since this would cause an ambiguity for the compiler.
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