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1·There has been a falling-off in box office income and other earnings.

票房收入和其他进项已经有所下降。《柯林斯英汉双解大词典》

2·The economic effects of the sports facilities are mainly gained in the box office income and the rental.

运动设施服务社会的经济收益主要来源于门票收入和租用收入；

3·However, after less than 10 years of flourishing, they are facing great decline in box office income.

但是经过了不到十年的繁荣之后，它们却面临着票房收入大幅度下跌的严重问题。