1) it is fairly easy to find out the reason that … 找出…的原因很简单。
注："fairly"，再用"very"你就OUT啦！
2) some obvious reasons for … are related to the fact that … 有关…的一些显而易见的原因是和…事实有关。
3) the answer to this problem involves many interrelated reasons. for one thing, . for another, … 这一问题的答案涉及许多相互交织在一起的原因。一个是…，另一个是…
注：interrelated reasons，相互关联的原因。
4) the causes for …, perhaps, are varied. they include ... probably the main reason is … 引起…的原因或许各种各样。它们包括…可能其主要原因是…
5) the change is chiefly caused by the fact that … 其变化主要是由这样的事实引起的，即…
注："chiefly"，表示主要的。
6) the failure mainly comes from several factors that … 失败主要产生于几方面的原因，即…
注：同上，意为“主要的”。
7) among the most important reasons offered by people for …, one should be mentioned.… 在人们给出的关于…最重要的原因中，有一个值得一提。
注："offered"，这样使用，高大上有米有。
8) it is rather easy to find out the reason why … 找出…为什么的原因相当容易。
注：可替代"very"。
9) the explanation for this question may involve several complicated factors, for one thing is …, for another is … 对这一问题的解释可能涉及许多复杂的因素。一个是…，另一个是…
10) the change in … largely results from the fact that … 在…方面的变化很大程度上是来自这样一个事实。
注："result from"，产生于…， 由…引起。
11) there are several causes of this significant growth in … 在…方面的显著增长是许多原因造成的。
12) i quite agree with the statement that ... the reasons are chiefly as follows. 我十分赞同这一论述，即…，其主要原因如下。
13) beyond these obvious reasons, however, lies a deeper cause: 然而在这些明显的原因之下隐藏着一个更深层的原因。
14) one of the reasons that is given for … is that … 已给出的关于…的原因之一是…
15) although … is probably the most important determinant, it is not the only explanation for … 虽然…可能是最重要的决定因素，但并不是对…的唯一解释。
16) perhaps this is because of the simple fact that … 这可能是因为一个简单的事实…
17) the factors for … are complex. 有关…的因素十分复杂。
