他估计，这种“舒适度”会在未来五到十年内显著提高。
He estimated that the "comfort level" will increase considerably in five to ten years.
有些人认为这个过程要花费五到十年的时间。
然而，五到十年之后，我们甚至记不起这些担忧。
However, in five to ten years we'll struggle to even remember these concerns.
我们发现在过去的十年内，就有五到十倍的增加。
We have seen a five to ten times increase just during the last ten years.
我们发现在过去的十年内，就有五到十倍的增加。
We have seen a five to ten times increase just during the last ten years.
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