an extremely important matter 极为重要的事情

Abortion is always a controversial issue. 堕胎总是一个有争议的问题。

Public education was one of the biggest issues in the election campaign. 公共教育是竞选运动中最重要的议题之一。

The subject of cloning raises complex ethical issues. 克隆这个话题引起了复杂的伦理道德问题。

He's never mentioned the subject of money. 他从未提到过钱的问题。

The subject of our debate today will be the environment. 我们今天辩论的主题是环境问题。

It was Carol who brought up the subject of sports facilities. 是卡罗尔提起的体育设施这个话题。

Somehow we got onto the subject of education. 不知怎么的，我们谈论起了教育这个话题。

Look, I don't want to talk about it, so can we drop the subject? 听着，我不想谈论这件事，我们别谈这个话题好吗？

We're getting off the subject here – let's get back to your book. 这个话题我们就到此为止，我们再回到你的书上吧。

Can we change the subject, please? 我们能换个话题吗？

Musical instruments are a recurrent theme in his still life paintings. 乐器是他静物画中反复出现的主题。

Good child care was the central theme of the conference. 良好的儿童保育是本次大会的中心议题。

She tried to think of another topic of conversation. 她想再找个话题。

The topic for discussion today is ‘The Health of the Nation'. 今天讨论的主题是“国民健康”。

His report did not address the question of air warfare. 他的报告没有谈到空战问题。

the vexed question of the national minimum wage 全国最低工资标准这个难题

We'll be covering a lot of new ground in today's lecture. 今天的讲座我们会涉及很多新的领域。

There's no point in going over the same ground twice. 同一个话题没有必要讨论两次。