Some years ago just means a general length of time in the past. Usually around 3-10 years depending on the way it's said and the context. Several usually means three of something. If …
这个结构换个角度理解就是“到目前为止的几年里”，所以搭配现在完成时。 而是说过去的几年一直在做什么事（比如环保啊什么的），而且是从现在的视角看。 知乎，中文互联网高质量的问答社区和创作者聚集的原创 …
I can't make it in several years. “几年内是不可能做到”与“几年后亦做不到”都行。 I will move my family from current city to that city. 其几年内搬家的愿望便比较清晰。 I can't get there in a while. 相当明确 …
High quality example sentences with “of several years” in context from reliable sources - Ludwig: your English writing platform
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