Since 2005 North American box-office receipts have risen by 20% (see chart).
自2005年以来北美票房收入上升了20%(见图表)。
So far this year box-office receipts are up by 12% over last year. Yet sales of DVDs are falling (see article).
到目前为止,今年的票房收入比去年增加了12%,但DVD的销售量却在下滑。
So Dr Watts looked at areas, like films’ box-office receipts, music and video-game sales, where some public data are available.
瓦茨博士审视着众多领域,如观察电影院票房的票根、音乐、电子游戏的销售,这些领域同样有很多公共数据可以利用。
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