In fact, there's every reason to think that they'll only get worse, and that's what it would look like if things just stayed the same, at the same linear rate, over the next 20 years.
事实上，我们有更多的理由认为 情况会变得更糟糕 这是在接下来的20年内 保持和原来一样、相同线性速率的情况