The renderings were so controversial that some critics blamed the disturbing images for the station's delayed by one-month opening.

VOA: standard.2010.07.10

Can you explain to us about stem cell research and why it's so controversial?

你能跟我们解释一下干细胞研究，
以及为什么这项研究会受到这么多的争议吗？

干细胞和伦理 - SpeakingMax英语口语达人

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

So of these things that are up here, are any that seem controversial to you or that you would have said wasn't on my list and I wouldn't say that that's Biomedical Engineering?

以上说过的这些东西,你们觉得哪个是有争议的,或者你们觉得有些东西属于生物医学工程,但我没有列出来,亦或是你们觉得,以上哪些不属于生物医学工程

耶鲁公开课 - 生物医学工程探索课程节选

So although it is controversial,

尽管动物实验具有争议性，

需要动物实验吗？ - SpeakingMax英语口语达人