经过数年的艰苦研究，他最终破译了该系统。
He has finally cracked the system after years of painstaking research.
我经过数年努力终于获得成功。
经过数年正常运行无任何质量问题。
There is no problem of quality in the use of functioning years.
这种政策经过数年的时间才得到认可，当然现在已经实行了。
It took several years to actually get that policy agreed, but now it is.
这种政策经过数年的时间才得到认可，当然现在已经实行了。
It took several years to actually get that policy agreed, but now it is.
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