51.   He probably learned how to conserve his energy a lot better than when he was a youngster.

52.   He may need to conserve his energy for his own survival.

53.   He has learned to conserve his energy, and preserve the confidence of his teammates.

54.   He no doubt wanted to conserve some energy to guard the sensational Kevin Garnett.

55.   He piled the snow around him, as insulation from the cold and protection from the wind, and settled down to sleep to conserve his energy.

56.   He husbanded his meager rations, conserved his energy during the day, and moved around at night, now and then activating his radio transmitter.

57.   He wanted to conserve energy.

58.   He was an economy car, conserving energy.

59.   He was conserving energy, he said, noting that he had recently held a meeting with Warner Brothers executives in the same position.

60.   High-mileage economy cars and low thermostats to conserve energy have given way to cheap gasoline and sport utility vehicles.