they are buying and cooking with other foods that are not as rich in healthy minerals and proteins
问题描述：
they are buying and cooking with other foods that are not as rich in healthy minerals and proteins
这个句子 That 后面是定语从句吗?后面的as 是干什么用的?直接为are not rich in.也可以吧,为什么要个as.
答
That 后面是定语从句
后面的as 表示一种比较
他们买和用的other foods与某些食物比起来,矿物质和蛋白质没有那么丰富
直接为are not rich in.不可以
因为意思就变成“他们买和用的other foods 矿物质和蛋白质不丰富
这样改变了原句的意思