Penny had been part of a similar, but more narrowly focused, study in the 1980s.

彭尼在20世纪80年代也作过类似的部分研究，但研究的目标比较狭隘。

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Penny had been part of a similar, but more narrowly focused, study in the 1980s.

彭尼在20世纪80年代也作过类似的部分研究，但研究的目标比较狭隘。

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