year after year与year by year区别

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year after year与year by year区别
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year after year与year by year区别
year after year与year by year区别

year after year与year by year区别
year after year强调动作的重复性,
year by year 强调动作的渐进性.
eg:We plant trees year after year and the trees grow taller and
taller year by year.

year after year 一年又一年之后
year by year 一年又一年的做什么事情