Can you imagine the difference in productivity between those who use a typewriter and those who use a computer?
你能想得到使用打字机和使用电脑之间的生产力差距吗?
I did feel the difference in my productivity.
我感到了我效率的不同。
This would only be true if there were no difference in the productivity growth rates between the two countries.
这只有在两个国家的生产率增长相同的时候才成立。
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