广州新东方酷学酷玩英语夏令营
the boy grows taller year by year, and he visits his
　　grandmother in the country on her birthday year after
　　year. 男孩逐年长高了，但他年年去乡下庆祝奶奶的生日。 （逐年长高是“变化”，而年年去乡下是“不变”的。）

　　year by year与year after year的区别

　　year by year = each year, one following on another 每年（把时间分开看待，一年接着一年）。例如：
　　year by year we grow a little older.每年我们都变老了一些。

　　而year after year = one year after another, without brea 年年；年复一年（把时间作为整体看待，期间没有间断）。例如：
　　we have been to that place for a holiday year after year, for i don't know how long.我们年年到那个地方度假，我不知道有多少年了。