《红宝书》考研英语词汇
每日一句
Demand comes mainly from two sources: independent mom-and-pop grocery stores which, unlike large retail chains, are too small to buy straight from producers, and food service operators that cater to consumers when they don’t eat at home.
词汇突破
grocery [ˈɡrəʊsəri]
n. 食品杂货店；食品杂货
cater [ˈkeɪtə(r)]
vt. 投合，迎合；满足需要；提供饮食及服务
结构分析
本句的主干结构是 Demand comes mainly from two sources。which are two small to buy straight from producers 是限定性定语从句，修饰 independent mom and pop grocery stores，其中 unlike large retail chains 是插入语。and 表并列，that 引导的定语从句修饰 food service operators。
参考译文
需求主要来自两个方面:与大型零售连锁店不同，独立的夫妻店规模太小，无法直接从生产商那里购买食品;食品服务运营商迎合不在家吃饭的消费者。
