11.   Cool, dry air will flow across the northern and central Plains into the central Mississippi Valley.

12.   Cool, moist air will flow into the northern Plains and Rockies, promoting widespread clouds.

13.   Cooler air will flow south through New England overnight.

14.   Drier and slightly cooler air will flow into the Northeast on gentle breezes.

15.   During normal breathing, air flows freely in and out of the lungs.

16.   Even caulking around baseboards can be effective because air can flow thrugh a baseboard joint into the uninsulated cavity of an interior wall.

17.   Generally, conditions are prime when cool dry air flows over warm, moist air near the surface, setting up turbulent conditions in which air masses clash.

18.   He figuratively opened some windows that allowed fresh air to flow through the department and let people feel good about their jobs and themselves.

19.   If air could flow freely into the cylinders, fuel efficiency would improve.

20.   In a well-ventilated attic, air flows in naturally from the area under the eaves and exits near the apex of the roof.