21.   The campaign plane began to dip down along the edge of East Texas, the thick, dark Sabine River twisting languidly along the Louisiana line.

22.   The duck glided back and forth on the water, occasionally dipping down to try to catch some breakfast.

23.   The price of natural gas is on the rise, just as the mercury is beginning to dip down around freezing weather.

24.   These were big-league darts, starting around shoulder level and dipping down around the ankles, a difficult proposition for anyone.

25.   Very fast, sinking air in the trough that dips down to the eastern foothills sometimes creates hurricane-force winds.

26.   Four Russian jet fighters circled overhead while an attack helicopter dipped down from the nearby Terek Ridge.

27.   In the attack today, four jet fighters circled overhead while an attack helicopter dipped down from the nearby snow-covered Terek Ridge.

28.   On Friday and Saturday, temperatures are expected finally to dip down to zero or below in some inland areas.

29.   You may have to dip down into the minor leagues and give the guys who may not be your top prospects a chance.