1.Whether US economy is going into recession has been a debatable issue among economists for quite some time now.
一段时间以来，美国经济是否已经陷入衰退在经济学家当中已经成为一个有争议的话题。
2.As the origin of Christmas has been a debatable issue, various theories has been suggested.
圣诞节的起源一直是个有争议的话题，有不同的理论被提出来。
3.It is a debatable issue in academic circles whether the Han nationality had epic in its early stage of history.
学术界在汉民族有无史诗的问题上一直聚讼纷纭。
4.has been a debatable issue.
是个有争议的话题。例如：
5.No Chinese would ever believe that we will become hegemony. Even using the term "power" among the Chinese is a very debatable issue.
在中国，根本没人认为我们会成为霸权，甚至使用“大国”这个词都存在争议。
6.Disclosing problems was never a debatable issue for them.
披露的问题，决不是一个值得商榷的问题。
7.I am afraid that is still a debatable issue.
恐怕还是一个值得商榷的问题。