Part three may look at a subtopic like cars and the environment, right?

第三部分可能是像汽车和环境这样的子主题。

The subtopics get wet and dry seasons like the tropics but it's less extreme.

跟热带地区一样，亚热带地区也有干湿两季，但不像前者的这么极端。

The main concept is often followed by two subtopics or two examples to further explain the main concept.

主要概念之后通常是两个子话题或两个示例来进一步解释主要概念。

And in the lecture, you're gonna, a professor is going to talk about two different aspects or two different subtopics of a larger topic.

在这个演讲中，教授将要谈论某个大话题的两个不同的方面或两个不同子话题。

As I said, there are lectures where two different aspects or subtopics of a bigger topic are discussed and the questions could go like this.

如我所说，这些演讲中会讨论某个大话题的两个不同方面或子话题，而问题会像下面这样。

These divisions have blurred somewhat in recent year and there subtopics, such as organometallic chemistry, being investigated by both organic and inorganic chemists.

近年来， 这些划分有些模糊，有机和无机化学家都在研究有机金属化学等副主题。

I'm going to try to keep the articles in this series shorter than usual, so it's easier for you to pinpoint the specific subtopics that are relevant to you.

我将尽量使本系列中的文章比平时更短， 这样您就可以更轻松地找出与您相关的特定子主题。

So typically, they will take one or two subtopics related to that theme and ask you maybe two or three questions for each subtopic, but it's all on the same theme as part two.

通常他们会选择一两个与该主题相关的子主题，并针对每个子主题问你两到三个问题，但都与第二部分的主题相同。