controversial public issues

But in the QQ group or some other public places, I am reluctant to make comments on some controversial issues relevant to some sensitive aspects like ethics or so.

可是在QQ群里或者某个公共的地方，在对某些具有争议性的而且涉及到道德等方面的事情进行评论时，我却不太愿意发表我的看法。

This can fuel public rows over the significance of disagreements between scientists about controversial issues such as climate change and vaccine safety.

当科学家之间在有争议的问题上 出现不同意见时，例如对于气候变化和疫苗安全性问题，这种误解会刺激公众对持有不同科学意见的重要性无端地展开争吵。

Of, relating to, or concerned with only a single public, especially controversial, issue, to the exclusion of all other factors, concerns, facts, and issues.

与一个公众尤其是有争议的问题相关的，把其它所有因素、关心、事实和问题排除在外的，与这个单一问题有关的，或只关心这个问题的。