This fabric contracts when it absorbs water.

This sentence is too long, please abbreviate it.

This document has been shortened for abbreviation.

This treaty was concluded to strengthen the friendly relations between the two countries.

Her graceful movements are just like a ballerina's.

The balance of intestinal bacteria greatly affects health.

He performed a circus act on a unicycle.

Vitamin B1 plays an important role in energy production.

I don't know a thing about him.

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