So, that could be referred to as the " churn" or the " churn rate."

所以，这可以称为“流失” 或“流失率” 。

A more common use of " churn" as a noun is a short form of the expression " churn rate" (rate).

“流失” 作为名词更常见的用法是“流失率” （比率）的缩写形式。

The " churn" or " churn rate" refers to the percentage of customers that sign up for or become members of a certain service and then leave.

“流失”或“流失率”是指注册或成为某项服务的会员然后离开的客户百分比。