Besides generating income, the presence of other marketers makes the site seem objective, gives companies opportunities to learn valuable information about the appeal of other companies’ marketing, and may help expand user traffic for all companies concerned. (2011英语一text 3)
重点词汇：objective, expand
解析：该句主语为“the presence of other marketers”，共三个谓语，由“and”连接，分别为为“makes”，“gives”和“may help expand”，宾语分别为“the site seem objective”，“opportunities”和“user traffic”。
翻译：除了创造收入，其他营销人员的存在使网站看起来客观，给公司机会了解有关其他公司营销吸引力的宝贵信息，并可能有助于扩大所有相关公司的用户流量。
