富人的课税负担有所下降。
要回答第二个问题，计算课税负担并非一件易事。
Working out the tax burden, to answer the second question, is no simple matter.
我说半个世纪以来，这个时候是富人课税负担的最低水平，我们当中最富有的人就多付一点。
I say that at a time when the tax burden on the wealthy is at its lowest level in half a century, the most fortunate among us can afford to pay a little more.
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