When the two top Japanese automobile makers matched and then doubled United States productivity levels in the mid-sixties, capital investment per employee was comparable to that of United States firms.
in the mid-sixties 这个时间表达是在1960年中期，还是1970年的中期呢？因为这个是个考点的关键，所以自由格外重视，感谢大家。ffice ffice" />
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