8 times the income is gained by families now than fifty years ago on average
问题描述：
8 times the income is gained by families now than fifty years ago on average
答
语法是对的
答
对的，现在家庭的平均收入是五十年前的八倍。
答
the income gained by families now is 8 times than fifty years ago on average
答
易产生歧义不如改成这样
8 times the income gained now is than the one fifty years ago on average.
答
Incomes gained by family now on average is 8 times the income fifty years ago.
中文解作：现在的家庭收入平均是五十年前的八倍.