托福阅读长难句:美国商业广播节目
Their competition and collaboration werecreating the broadcasting industry in the United States, beginning with theintroduction of commercial radio programming in the early 1920s.
记忆单词:
competition n.比赛
competitor n.参赛者
competent adj.有能力的
competence n.能力
collaboration n.合作
collaborate v.合作
commercial adj.商业的
commodity n.商品
理解句子:
此句结构清晰,划线部分为分词作状语。