• 1. retain cycle: 保留环 | 循环引用问题 | 循环引用

• 1.Why the retain cycle warning not thrown?
  为什么保留周期警告不要扔？
  dict.yoduao.com
• 2.Through marketing policy adjustment, through the call center for off-grid effectively retain customers, to win customers, even into the new customer life cycle.
  通过市场营销政策的调整，可通过呼叫中心对离网客户进行有效挽留，甚至重新赢得客户，进入新的客户生命周期。
  dict.yoduao.com

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