教育仍然是公共辩论的核心话题。

Education remains a central topic of public ___debate.

实现这一目标的最佳方法仍有待讨论。

The best method to achieve this is still a matter for ___debate.

今年我们已经就环境问题进行了多次热烈的讨论。

We've had many lively ___debates about environmental issues this year.