e.g. a.Research shows those most likely to upgrade household appliances are households with children,married couples and consumers with income over $50,000. 研究发现最有可能更新家用器具的是有孩子的家 庭，已婚夫妇以及收入超过50,000美元的消费者。 b.It is estimated that average annual household income is between $10,000 and $15,000.e.g. a. Research shows those most likely to upgrade household appliances are households with children, married couples and consumers with income over $50,000. 研究发现最有可能更新家用器具的是有孩子的家 庭，已婚夫妇以及收入超过50,000美元的消费者。 b. It is estimated that average annual household income is between $10,000 and $15,000