These are complex and controversial issues.

这些都是复杂而具有争议的议题。

youdao

Mercy killing is one of the most controversial issues in the world of medicine.

安乐死是医学界最有争议的问题之一。

youdao

While talking to her don't discuss controversial issues and don't talk endlessly.

和她说话的时候不要讨论些有争议的话题，也不要没完没了说个不停。

youdao

"Organizations that work on controversial issues or that are affiliated with political opposition have more trouble with the authorities,".

VOA: standard.2009.08.04

It broke ground by using a children's drama to tackle controversial issues such as drug addiction.

BBC: RELATED BBC SITES

Where it comes from and where it goes are this election's most controversial issues.

CNN: MONEY TALKED, BUT HOW LOUDLY?

Imagine today's Congress passing, by bipartisan majorities, legislation on two controversial issues: taxes and immigration reform.

CNN: Epic failure by Washington sets us adrift