top-up
noun[Cusually singular]
uk/ˈtɒp.ʌp/us/ˈtɑːp.ʌp/top-upnoun[C usually singular](LIQUID)
theactof putting moredrinkinto someone'sglassorcup
向（某人）的杯子里添加饮料
Yourglassisnearlyempty. Would you like a top-up?你的杯子快空了，我给你满上吧。
theactofaddingliquidinordertofillto thetopacontainerthat is alreadypartlyfull
注满，加满（未满的容器）
top-upnoun[C usually singular](EXTRA AMOUNT)
mainlyUK
anextraamountof something,especiallymoney, that isaddedto anexistingamounttocreatethetotalyou need
补足（尤指钱）
Inadditionto hisstudentloan, hisparentsgive him a top-up of £300 amonth.除了有学生贷款外，他父母每个月还额外给他300英镑。