If we get back before twelve thirty, we won't be too late for lunch.

十二点半以前赶回去还吃得上饭.

《现代汉英综合大词典》

We should be back here around twelve thirty.

大约中午12点30分我们就会回来.

互联网

I suppose that at a push we could see you between twelve and twelve thirty.

我想不得已时我们能在12点到12:30之间见你.

互联网