She relies on tips to top up her wages.

她靠小费弥补工资的不足。

《牛津词典》

My mobile phone is out of credit，I have to top up it .

我手机没钱了，得去给手机充值。

youdao

If it fails to inflate, or you need to top up the air, blow into this tube.

如果不能完成充气，或者你需要把气充满，可以往这个管子里吹气。

youdao

There was a new effort to build wealth from the bottom up, rather than from the top down.

VOA: special.2011.03.24

These are just little things that can add up, so you just want to make sure you're on top of those.

这些小事情也会影响到你的总分，因此务必熟练掌握。

麻省理工公开课 - 化学原理课程节选

And if I'm already in this habit, let my software, let my computer do that thinking for me and bubble up to the top of my attention what I should address first.

如果我已经有这样的习惯，让我的软件，或者电脑为我考虑这些事情，自动的把这,些邮件放到的最醒目的地方---最上面。

哈佛公开课 - 计算机科学课程节选

The other is a way to top up the healing molecules once some of them have been used.

ECONOMIST: Monitor

The payment of benefits to top up the income of low-wage workers does raise thorny issues.

ECONOMIST: Labour��s wage policy

The court told Coventry City FC to top up a deposit fund to cover ACL's unpaid invoices.

BBC: Coventry City FC faces ?1.1m rent demand