请帮帮我翻译一下 我真的看不懂 他的意思 谢 In the telecommunications industry, the “churn”and “no churn” prediction is usually expressed as a lift curve. The lift curve plots the fraction of all churners having churn probability above the threshold against the fraction of all subscribershaving churn probability above the threshold. The lift curve indicates the fraction of all churners can be caught if a certain fraction of all subscribers were contacted. Since the customer services centers of a carrier only have a fixed number of staff that is able to contact a fixed fraction of all subscribers, the lift curve, which can estimate the fraction of churners can becaught given the limited resources, is very useful in the telecommunications industry. The lift curve representing perfect discrimination of churners from nonchurners and that representing no discrimination of churners from nonchurners under a churn rate of 5% are shown in Fig. 8(a) and (b), respectively. We refer to the former and the latter as perfect churn predictor and random churn predictor --

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