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Now the nation’s top patent court appears completely ready to scale back on business-method patents, which have been controversial ever since they were first authorized 10 years ago. (2010 text2)

主句：Now the nation’s top patent court appears completely ready to scale back on business-method patents

定语从句修饰business-method patents：which have been controversial

时间状语从句修饰定语从句：ever since they were first authorized 10 years ago

翻译：现在，美国最 高专利法院似乎已经完全准备好缩减商业方法专利，自10年前首次授 权以来，商业方法专利就一直备受争议。