首先,times做比较时的用法
1)X times+as+adij./adv.+as
2)X times+the+n.
3)X times more than
其次,分析句子结构
A new hair-growing drug is being sold for three times the price[, per milligram, ]that the drug’s maker charges () for another product with the same active ingredient.
per milligram是插入语。that定语从句,先行词price,从句中作为charges的宾语three times the price that the drug's maker charges
如有不对请指正
-- by 会员 tintinc (2011/3/28 19:37:57)