OG_SC 2题：为什么an area 后不能加上that is

bluedkny

has grown from 48 million to nearly 59 million, an area about the size of Colorado

怎么分析an area.... colorado 的成分。加上that is 可以吗？

tongxun

这里是同位语。若加上that is就变的罗嗦了，因为去掉that is并不影响句意。简洁可是ETS的爱好。

bluedkny

thanks a lot. so many days not came.