top-up

top-up
ˈtop-up noun [countable] British English
1. an amount of liquid that you add to a glass, cup etc in order to make it full again:
    Would you like a top-up?
2. an extra payment that brings an amount to the desired level:
    top-up loans for students

top-upBrE /ˈtɒp ʌp/ 🔊NAmE /ˈtɑːp ʌp/ 🔊 noun (BrE) a payment that you make to increase the amount of money, etc. to the level that is needed 附加付款◆a phone top-up (= to buy more time for calls) 电话充值费◆Students will have to pay top-up fees (= fees that are above the basic level).学生必须交附加费用。(informal) an amount of a drink that you add to a cup or glass in order to fill it again （重新斟满杯子的）补充饮料◆Can I give anyone a top-up? 我来给哪位添酒好吗？🔊🔊