n.保留物；保存；保持(力)；记忆力

The retention is withheld only for bonus situation. 滞留金只是为了发奖金。

Did you specify a reasonable retention age? 是否指定了合理的保持期?

Plan a retention policy for e-mail messages and log entries. 为电子邮件和日志项计划一个保持策略。

I know that your powers of retention 我清楚你们的记忆力

Visual material aids the retention of information. 直观材料有助于加强记忆。