三级经济学强化串讲课讲义18页中一句话没理解。Even if non-domestic interest rate remain unchanged，the real return earned by the investor will not equal the non-domestic real interest rate unless purchasing power parity holds over the investor's horiz三级经济学强化串讲课讲义18页中一句话没理解。Even if non-domestic interest rate remain unchanged，the real return earned by the investor will not equal the non-domestic real interest rate unless purchasing power parity holds over the investor's horizon.请解释下，后半句购买力评价是如果影响的？on.请解释下，后半句购买力评价是如果影响的？
