Sentence examples for be a persistent source from inspiring English sources
Solid phase high explosive (HE) residues from munitions detonation may be a persistent source of soil and groundwater contamination at military training ranges.
If precession is confirmed and the Vela pulsar is indeed a distorted neutron star, it should be a persistent source of gravitational waves, and would be a prime target for the next generation of gravitational wave detectors designed to test Einstein's theory of general relativity.
The McCain campaign's lobbyist ties have proved to be a persistent source of criticism as well as questioning during this election season, and it shows no immediate signs of letting up.
This is a persistent source of strain and conflict in modern societies.
But the economy, he said, "is a persistent source of discontent," unlike the other two, which can ebb and flow depending on daily events.
China's military exports, particularly weapons sales to Pakistan and Iran, have been a persistent source of tension in relations between China and the United States.
Control over the site has been a persistent source of friction between Israel and the Palestinians, and has sparked violence between the two sides.
Decommissioned officers and former soldiers unhappy with their job prospects and welfare have been a persistent source of protests outside government offices.
The construction industry in general has been a persistent source of problems for the administration of Mayor Michael R. Bloomberg, who has been an aggressive champion of development over the course of his two terms.
