trickle charge

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释义
涓流充电
An electric charge supplied to a storage battery at a continuous low rate to keep it fully charged.

例句
Pink: What's this?
Walt: I'm trying to trickle-charge the battery. (Breaking Bad)
平克：这是干啥？
沃尔特：我在试着给电池涓流充电。（绝命毒师）