When he tried breathing through his nose, huge bubbles of blood expanded and popped.

The bronze man manipulated the tiny jets again, and the big bubble expanded more.

As in water, only bubbles of a certain size will survive and expand, smaller ones collapse.

The bubble air pressure has to match the change, so the bubbles expand.

A piece of clay with many air bubbles will have these bubbles expand during baking.

Likewise, a bubble of gas within the object will expand rapidly on heating and cause the material to shatter.

The bubble expanded, reluctantly enveloping me and the boy.

So each little bubble gets more CO2 in it, expands in size, and rises.

He grinned at her, his bubble of enjoyment expanding.

As the bubbles of gas expand they cool and help set the chocolate.