Lastly, put the topics and subtopics into a logical order.

最后，将主标题和小标题按逻辑顺序排好。

youdao

I think this is one of the most complex and fascinating subtopics within the subject of happiness.

我认为这是一个在快乐话题中最为复杂、最精彩的子话题。

youdao

Develop the related subtopics around this central topic, connecting each of them to the center with a line.

围绕这个中心主题发散相关副主题，并将每个副主题和中心用一条线连接起来。

youdao

Under each main heading are 6 to 10 subtopics, ranging from Asset Allocation to Vanguard funds to Social Security to annuities.

FORBES: Wiki's In-depth Vanguard Data

The labels are informative little essays nicely placed like slanted tabletops, below sightline. (The cartoonish icons for the audio guide, however, are inexplicably placed right next to the paintings on the wall.) And the subtopics landscape and portraiture, what was painted overseas versus what was created back home in America, etc.

WSJ: Americans in Florence | Palazzo Strozzi | The Florentine Mix | By Peter Plagens