But in the last year, Paul Crutzen published this essay saying roughly what's all been said before: that maybe, given our very slow rate of progress in solving this problem and the uncertain impacts, we should think about things like this.
但是在去年，保罗·克鲁岑发表了这篇文章， 文章的大概内容和过去大体相同：遮挡的方法可能会让我们在 解决问题时速度放慢，而且有不确定的影响， 但是我们应该从这个角度来考虑这一问题。