This sentence is written in a contracted form.

This fabric contracts when it absorbs water.

This document has been shortened for abbreviation.

This sentence is too long, please abbreviate it.

He is a lawyer with a deep understanding of the covenant.

Using punctuation marks correctly is important for understanding sentences.

Paying the urban planning tax is a citizen's duty.

This new product is only available for pre-order sale, and is not sold in stores.