* In the chemical formula H₂O, the "2" is a subscript indicating two hydrogen atoms.

* The subscript in the mathematical equation x² denotes that x is squared.

* The subscript on the graph axis labeled "time" specifies that it is measured in seconds.

* When writing a scientific paper, it's important to use subscripts correctly to ensure clear communication of your data.

* The font used for the subscripts in this document is slightly smaller than the main text.