That will start to emerge at this summit, but there won't be agreement on that issue, which is very controversial."

VOA: standard.2009.10.29

So what to eat, what the optimal diet is has become a pretty controversial issue.

吃什么和如何确定最佳食谱,成为冲突的两个问题

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

What is the most controversial issue in the UK right now?

现在英国最有争议的话题是什么？

新闻社的真实事件 - SpeakingMax英语口语达人

What's the hot controversial issue in San Francisco right now?

旧金山现在的热点争议话题是什么？

关于旧金山的热点 - SpeakingMax英语口语达人