This is not a new topic.

这不是个新观点。

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He introduced a new topic for our discussion.

他提出了一个新的议题供我们讨论。

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This is a new topic for Visual Studio developers.

对于Visual Studio开发人员来说，这是一个全新的主题。

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So let's turn our attention to a new topic, which is thinking a little bit about the periodic table, and also talking about periodic trends.

我们的新主题上，我们将会讨论一点关于元素周期表的知识，同时也会讲一讲周期性规律。

麻省理工公开课 - 化学原理课程节选

This is a shift, this is a new topic that we're starting.

这是一个转折点，我们要讨论一个新的话题。

麻省理工公开课 - 化学原理课程节选

N 2 So any chemist should be able to just look at n 2 and know that it's a triple bond, but that's not something that we've learned how did to do yet, so let's go ahead and start a new topic that's going to allow us to have some sort of sense of what the valence electron configuration, which includes whether something's a single or double or a triple bond can be figured out for any given molecule.

任何一个化学家都应该能够仅仅通过看到2,就知道它有一个三键,但是我们还没学习如何做到这点，因此下面我们就开始进入一个新的主题,它将使我们能够有一定的认识,对于价电子的排布情况，包括可以对任何一个给定分子中的键是单键双键,还是三键作出判断。

麻省理工公开课 - 化学原理课程节选

The fiscal cliff will not be a new topic to regular readers of this column.

FORBES: For The Republicans There's An Opportunity At The Fiscal Cliff

When you're tackling a new and challenging topic, starting from a solid foundation is crucial to success.

WHITEHOUSE: Getting It Right for Indian Country

The lack of a new name quickly became a hotly debated topic on the Twitter website.

WSJ: Why Doesn't the New iPad Have a Name?