Reviews are distilled from articles previously published in the main column.评论是从之前发表在主要专栏的文章中提炼出来的。Oils are extracted from the plants.油是从这些植物中提炼出来的。The most effective new botanicals are extracts from cola nut and marine algae.这种极其有效的新型植物制剂是从可乐果和海藻中提炼出来的。