51.   The retractable roof likely will be closed before a game for at least three hours to cool the stadium.

52.   The retractable roof hangs ominously over right field.

53.   The retractable roof means some conditions can be manipulated a little to suit a game situation as well as fan comfort.

54.   The structure will also feature a retractable roof.

55.   The stadium also has a retractable roof, unique among the major British soccer stadiums.

56.   The task force recommended construction of an open-air ballpark with natural turf and a retractable roof.

57.   The team was intent on playing in a stadium with a retractable roof because of the intense summer heat.

58.   The very grass the game is played on was replaced by carpet years ago in many stadiums, and the blue sky was replaced by retractable roofs.

59.   There is a practical need here for a domed stadium or one with a retractable roof.

60.   The votes already are already being plotted in his favor as routinely as the retractable roof will operate at the new Mariner ballpark.