31.   An employee uses a control knob to keep a moving diamond centered on a computer screen while the computer makes the task increasingly difficult.

32.   Analysts say cross-purpose donations within families appear especially common in primaries, when disagreement often centers on which candidate is most electable, rather than on fundamental principles.

33.   And in other cases, the debate centers on the degree to which a fib becomes a major offense.

34.   And minority AIDS organizations that once centered on support groups and condom distribution have now turned some of their attention to politics and fund raising.

35.   And commercial boats scoop up fish for the live trade centering on restaurants and aquariums, a booming global business fueled by staggering sums of money.

36.   And in Palm Beach County, the challenge will center on the decision by the elections board not to count many dimpled ballots as votes.

37.   And in the last three years, astronomers have found evidence of systems centered on six stars, each with two or three detected planets.

38.   And Havas Advertising in Paris acquired Lifestyle Marketing Group in Paris, which specializes in sports sponsorship as well as promotions centered on music and movies.

39.   And his current read now centers on the slim pickings among free-agent pitchers.

40.   And I am able, much of the time, to live a life reasonably well centered on the eternal values that give it meaning and purpose.