61.   The facility also serves as a badly needed testing ground for new chemicals designed to break up spills.

62.   The months of campaigning here have been a testing ground for themes that have riven the Republican Party.

63.   The next baseball negotiation could be the first testing ground for it, if it works for the owners in the NBA.

64.   The last few months will surely be remembered as a critical testing ground in which three different approaches were tried.

65.   The Mojave is a testing ground for the next generation of Mars rovers.

66.   The Mojave is an ideal testing ground partly because of the ruggedness of its terrain and its abundance of craters.

67.   The next year, a better testing ground came up when the Dutch government appealed to the United States for help with a screwworm plague in Curacao.

68.   The red capitalists also started using Hong Kong as a testing ground for making money.

69.   The testing grounds are full-scale landscapes of chaos and seem little like the toy racetracks from past titles.

70.   The two men quickly agreed that Bolivar would make a suitably challenging testing ground for giving workers greater control over their surroundings.