The problem is that the statistical models that comprise economists’ toolkit are best applied in normal times, so economists naturally like to describe the situation as normal. If the current slowdown is typical of other slowdowns in recent decades, then we can predict the same kind of recovery.
问题是经济学家工具箱里的统计模型最适用于正常时期，因此经济学家们自然也喜欢找正常那样描述情况。如果当前的放缓跟近几十年的经济放缓一样具有典型性的话，那么我们就可以预测同一类型的复苏。