(一)原因
1.A number of factors are accountable for this situation. 许多因素都对这一情况负责
A number of factors might contribute to (lead to )(account for) the phenomenon (problem) 许多因素可
能导致(导致)(考虑到)这一现象(问题).
2.The answer to this problem involves many factors 这个问题的答案涉及因素较多
3.The phenomenon mainly stems from the fact that... 这种现象主要源于以下事实:.
4.The factors that contribute to 有助于 this situation include...
5.The change in ...largely results from the fact that...
6.We may blame ...,but the real causes are... 我们也许会批评…,但真正的原因是……
7.Part of the explanations 解释 for it is that ...
One of the most common factors (causes .is that .. 最常见的因素(原因。是….
Another contributing factor (cause .is ... 另一个因素(引起。是. .
Perhaps the primary factor 主要因子 is that …
But the fundamental cause is that 但根本原因是