Formal English articles should also be indented in the first line. But the first line of the first paragraph is capitalized and not indented.

For example, the indentation requirements in the format requirements of English papers:

The first paragraph: both ends are aligned and not indented.

Other paragraphs: the two ends are aligned and the first line is indented by 0.63cm；; There are no blank lines between paragraphs.

Indentation of the first line: the first line of a paragraph is indented from left to right for a certain distance, and all lines except the first line remain unchanged, which is convenient for reading and distinguishing the overall structure of the article.