As the price of gasoline rises, making alcohol distilled from cereal grain an attractive substitute, the prices of bread and livestock feed are sure to increase.

　　=As the price of gasoline rises/, making alcohol/ distilled from cereal grain/ an attractive substitute/, the prices of bread and livestock feed are sure to increase.

　　#随着汽油涨价/，使得酒精/从谷物中蒸馏提取出的/成为抢手的替代品/，面包和牲畜饲料的价格一定会上涨。

　　*这个句子比较简单，容易理解。As 在这里是“随着”的意思，making…a substitute 是使… 成为替代品，中间被distilled from cereal grain 分隔，所以要把这个分句看完才能明白它的意思。

　　Unlike cigarette tobacco, which yields an acid smoke, pipe tobacco, cured by age-old methods, yields an alkaline smoke too irritating to be drawn into the lungs.

　　=Unlike cigarette tobacco/, which yields an acid smoke/, pipe tobacco/, cured by age-old methods/, yields an alkaline smoke/ too irritating to be drawn into the lungs.

　　#和卷烟不同/，卷烟产生酸性的烟/，烟斗/用老方法烤的/产生碱性的烟/太刺激以至于不能吸入肺。

　　*这个句子是把卷烟和烟斗进行对比，用Unlike连接，比较容易理解。其中too …to句型需要注意，意思是太…以至于不能…，虽然是肯定形式却表达了否定的意思。