The study, led by Jeffrey Johnson of Columbia University in New York, followed 707 participants in upstate New York for 17 years, recording their TV viewing habits and tracking their behavior through periodic interviews and public documents.是什么意思_The study, led by Jeffrey Johnson of Columbia University in New York, followed 707 participants in upstate New York for 17 years, recording their TV viewing habits and tracking their behavior through periodic interviews and public documents.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句