a top-up一次充值
Top-up Courses专升本课程
Top-up degrees专升本课程
Top-up program先花一年时间读专升本
top-up operation恒流运行
CIM Top-up市场营销
Top-up p课程入学要求
keep top side up请勿倒立;请勿倒破;请勿倒置;请勿到置
top-up loans二按服务
PHRASAL VERB（动词词组） If you top something up, you make it full again when part of it has been used. 重新加足 [英国英语]
We topped up the water tanks.
我们重新把水箱添满了。