有没有变化格式要求?否则有很多种变化形式哦.
最常见的变化如下：
= They spend 200 yuan (in) buying the Walkman.
= They pay 200 yuan for the Walkman.
= They buy the Walkman for 200 yuan.
= It costs them 200 yuan to buy the Walkman.
= The Walkman costs them 200 yuan.
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