31.  At the center of the atom is the nucleus.

32.  At the center, his grandfather, as a young man, stands behind a chair in which his wife sits.

33.  At the center, however, we were determined to tell the whole truth from first to last.

34.  At the home of Rose Falconio, a large photograph of James takes center stage on a living room wall.

35.  At the same time, regulatory agencies have demanded more from these centers, forcing them to do more with less money.

36.  At the town center were two low church spires of oxidized copper surmounted by twin crosses.

37.  At this time the Union center, having reformed after falling back under the early attacks, was still standing fast.

38.  Atlanta was a manufacturing center of vital importance to the Confederate war effort.

39.  Bahlman is throwing his weight behind the cultural center proposal.

40.  Baku town center is filled with stalls, cafes, historic monuments.