关于可能的工作流失，已经有一些谈论。

There's been some ___talk of possible job losses.

最近有很多关于环境问题的谈论。

There's been a lot of ___talk about green issues lately.

确实，关于安乐死也有很多谈论。

It is also true that there has been a lot of ___talk about euthanasia.