尽管在这区区3.5平方英里的皮尔森发生过那么多的历史事件，但几十年后，曾在那里长大的我和朋友们基本上对皮尔森的过去一无所知。
Despite the historic events that occurred within the 3.5 square miles of Pilsen, my friends and I, growing up there generations later, were largely ignorant of its past.
虽然在刚开始时，研究者尚不了解任何让他们感兴趣的具体基因，但当年对数据的搜集令科学家可以在几十年后评估相关的遗传风险。
Even though specific genes of interest weren't known when these studies began, data were available that allowed scientists to evaluate genetic risk decades later.
但放眼几十年后，河水水位将下降。
But in the longer perspective of a few decades, river water levels will decline.
而且，虽然氢气被吹捧为未来的燃料，但按照最乐观的估计，这也是几十年后的事了。
And while hydrogen is touted as the fuel of the future, at best it is decades away.
而且，虽然氢气被吹捧为未来的燃料，但按照最乐观的估计，这也是几十年后的事了。
And while hydrogen is touted as the fuel of the future, at best it is decades away.
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