Increasingly, the politics of London policing have centred on budget cuts and an unending quarrel over "police numbers".
She said sluggish trade growth in 2012 and 2013 appeared to have centred on advanced countries.
A Welfare Reform bill aiming to help counter the recession would have centred on two points.
The city's postwar industries have centred on aircraft and missile manufacturing and electronics research and manufacture.
So far, the studies of motivated reasoning have centred on the US.
The latest protests have centred on the grape-growing area around the town of De Doorns.
Since the 1980s, the changes to the care system have centred on the concept of permanency.
A number of inquiries have centred on activities during his time in office, or before.
Subsequent efforts to suppress printed matter have centred on questions of libel, obscenity, or national security.
Reports on his absence have centred on speculation that he is staying away until legal challenges are resolved.
Various theories of the origin of schizophrenia have centred on anatomical, biochemical, psychological, social, genetic, and environmental causes.
