So I proposed a story on the global fish crisis, in part because I had personally witnessed a lot of degradation in the ocean over the last 30 years, but also because I read a scientific paper that stated that 90 percent of the big fish in the ocean have disappeared in the last 50 or 60 years.
因此我起草了一个关于全球鱼类危机的报道， 部分是因为在过去三十年间，我亲眼目睹了 这一问题在海洋中的恶化过程， 也是因为我读了一篇科学论文， 这篇论文表明，海洋中百分之九十的大型鱼类 已经在过去的50或60年内消失了。