这道题真正要读的时候要学会正确的断句:add 2 percent of one’s annual income to the average (arithmetic mean) of 100 units of Country R’s currency and 1 percent of one’s annual income
这句话断句是这样的:
add [2 percent of one’s annual income] to the average (arithmetic mean) of{ 100 units of Country R’s currency and 1 percent of one’s annual income}
add X to average of Y and Z 就是X + (Y+Z)/2 其中 X = 2 percent of one’s annual income = I/50 Y = 100 units of Country R’s currency = 100 Z = 1 percent of one’s annual income = I/100