文章的结构需要有层次感。

Wénzhāng de jiégòu xūyào yǒu céngcì gǎn.

The structure of the article should have a sense of hierarchy.

这个问题涉及到不同的层次。

Zhège wèntí shèjí dào bùtóng de céngcì.

This issue involves different levels.

写文章要注意结构的层次，让读者容易理解。

Xiě wénzhāng yào zhùyì jiégòu de céngcì, ràng dúzhě róngyì lǐjiě.

When writing an essay, you should pay attention to the levels of structure so that readers can understand easily.