1.   Clearly it was just an accident of history, a fluke, a momentary incursion of an otherwise universal pandemic.

2.   They were shattered by the sudden incursion of a resounding bass voice which broke into song.

3.   But at the same time these physical forms are the means by which each group actively monitors, and sometimes resists, the incursions of others.

4.   An incursion of cold air will also take place in the Gulf Coast states.

5.   A further incursion of warm air results in falling snowflakes melting into raindrops, which may freeze into pellets of ice or freeze on impact with cold surface objects.

6.   After his death, Greek-Afghan city-states continued to exist and coalesce, washed over now and then by invasions or incursions of peoples from east and west.

7.   But editorial writers and other commentators have decried Stern as one more dangerous incursion of American culture into a country desperate to protect its own fragile cultural identity.

8.   But many Duma members see the law as a means to stem what they view as an alarming incursion of foreign ideologies on Russian soil.

9.   But the incursion of high-flown physics ideas into geology has been driven by more than just the creative powers of the new theorists.

10.   By allowing the resorts to use once-undrinkable salty water, the plants ease the strain on aquifers and help slow the incursion of salt water.