The most significant problems of Mr. Ashcroft's tenure have been centered largely on the F.B.I.
"All of my voyages have been centered around themes," Stowe said.
Until now, though, most of their efforts have been centered on the critical holiday season.
Traditionally, nature reserves have been centered mainly around areas that are important for vertebrate diversity.
But lately, his thoughts have been centered on something more cerebral: the poetry of E. E. Cummings.
A host of questions remain about the bomb plot, which appears to have been centered in the Canadian cities of Montreal and Vancouver.
Though Mr. Jeffries declined to describe the contents specifically, he said the issue would have been centered on "kids having a great time at the holidays".
Firefighters said the blast appeared to have been centered near the edge of a ramp about 100 feet from the street entrance.
Usually, the automated systems for quality control based on computer vision have been centered on the design of algorithms for detecting different types of defects.
Past investigations of zwitterionic materials for biomedical uses have been centered on exploiting their ability to inhibit non-specific adsorption of proteins.
For centuries, houses have been centered on an interior courtyard garden and equipped with windows that are few and small, to conserve heat in winter and ward off sun in summer.
