但学术界对其探讨还十分粗略，尤其缺乏实证性研究。

But the exploration of academic circles is still superficial, especially short of positivism research.

我们正在给我们的欧洲同盟传递信息：你欠我们的，我们应该讨还。

We are sending an American message to our European allies: Vous nous devez. You owe us.

乔的父亲，一个愁容满面、口音浓重的农夫上门讨还乔的帽子，我局促不安地还给了他。

Joe's father, a worried-looking farmer with a thick accent, asked for Joe's hat. I returned it sheepishly.

十年来，她同世界上最大的烟草公司之一展开法律斗争，为1997年死于肺癌的丈夫讨还公道。

For 10 years she has been waging a legal battle against one of the world's largest tobacco corporations, seeking justice for her husband who died from lung cancer in 1997.

由于烟草行业的品牌中心制是营销学的一个新课题，以及本人对广告学相关理论缺乏系统地学习，因此，本文在广告传播领域以及对品牌中心制的探讨还显得较为浅显而有许多不足。

Because the brand center system is fresh in tobacco-industry of China, and the advertisement knowledge is scarce to me. This paper is a great shortage of the domain of this two.