times as....as的用法

luckg

In the 1980's the rate of increase of the minority population of the United States was nearly twice as fast as the 1970's.

Key: twice what it was in

为什么twice as fast as it was in不对？我记得语法总结里有这么一个用法，还表示“是。。。的几倍”。而且ETS不是解释说waht it was不简洁吗？

chnp

rate不能从fast角度来比较。

bloodymica

以下是引用chnp在2006-8-6 23:37:00的发言：
rate不能从fast角度来比较。

对，跟lz考虑的不是一个问题