自七十年代后半期以来。在国际经济力量对比中，巳发生某些有利于美国的新变化。
Since the latter half ofthe 1970s, changes that have taken place in the world economic balance are in favour ofthe United States.
自七十年代后半期以来。在国际经济力量对比中，巳发生某些有利于美国的新变化。
Since the latter half ofthe 1970s, changes that have taken place in the world economic balance are in favour ofthe United States.
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