BBC上的一则新闻
At the same time,policymakers have found it tough to boost domestic consumption enough to offset a decline in foreign sales.
这里的found it tough to，为什么不用it is
希望大家能解答一下
At the same time,policymakers have found it tough to boost domestic consumption enough to offset a decline in foreign sales.
这里的found it tough to，为什么不用it is
希望大家能解答一下
