One of the premier causes is that(注意用詞)

　　最重要的原因之一便是______________。

　　At the risk of sounding too simplistic, it seems to me that the main propositions can be summarized in one saying.

　　這個原因可能較簡單，不過，我認為可以用一句諺語來概括，________。

　　We may look into every possible reason, however, foremost reason for .... Is ....

　　其實有很多原因，不過，造成________的最重要的原因是______________。

　　It might also be noted that....

　　需要注意的是，____________。

　　Another reason why .....(湊字?jǐn)?shù)，但不可濫用) is that....(有利于寫長句)

　　What is also worth noticing is that....

　　值得一提的是___________________。

　　There is another factor that deserves some words here.

　　還有另外一個很重要的原因。

　　A more essential factor why.... Is that

　　________ 的更為重要的原因是____________。

　　A further reason why,,,, is that.....

　　________的更深層次的原因是____________。

　　In addition..此外，再者

　　Moving on to wider themes,_______

　　展開來說，_________________________。

　　The second thing that must be taken into consideration is that...

　　第二個原因也很重要(值得考慮)，亦即__________。

　　Likewise(同樣), common sense tells us that...

　　同樣，___________，這是眾所周知的。

　　The third but very important reason is that...

　　第三個(盡管不是很重要)原因是______________。

　　The third, not the last is that,

　　第三個原因是___________。

　　The last factor to be taken seriously is...

　　第三個重要原因是_______________。

　　Finally, moreover, last but not least, furthermore.

　　As the proverb goes: "every coin has its two sides", ....is no exception.

　　俗語有云："萬事萬物都有兩面性。" ________也不例外。

　　Every thing has a good side and a bad side, and ....is no exception.

　　萬事萬物有其兩面性，而________也是如此。

　　The discussion as to whether the ... is a blessing or a curse arouses most people's interests.

　　__________是好壞利弊問題引起了很多人的興趣。