People bring heat with them. They also add wetness to the dry air.

VOA: special.2009.12.15

"It's so simple. With a two-liter bottle you add sugar, you add extract, you add a small amount of yeast and water, cap it up and in two days they've got root beer.

VOA: special.2011.08.01

Foreign Minister Krishna said the understandings reached with Clinton add a "qualitative substance" to the bilateral relationship.

VOA: standard.2009.07.20