over the years与during the years区别

over the years与during the years区别 during the last few years与during the last a few years有区别吗? During the past two years与in the past two years区别 during the school years over the years和through the years有什么区别 during the past 20 years 和 over the past 20 years一样吗? over the years是什么意思? over the years同义词 over the next few years与over the past few years over the years 等于什么? over the two years是什么意思? over the past ten years