通过对四十年代
Through the study of the 1940s
以上为机器翻译结果，长、整句建议使用 人工翻译 。
二十世纪四十年代在电视进入美国千家万户以前，企业主要是通过报纸杂志与广播对其产品及服务进行宣传。
Until the late 1940s, when television began finding its way into American homes, companies relied mainly on print 1 and radio to promote their products and services.
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