I didn't get a red cent for all my work.

我做了那么多工作，可什么也没得到。

Not one single red cent!

并非一单个的一分钱！

His advice about gardening wasn't worth a red cent.

他的关于园艺方面的建议不值一文。

I'm sorry. I can't lend you anything-i don't have a red cent.

很抱歉，我不能借钱给你——我身无分文。

She offered me a ring in exchange but it wasn't worth a red cent.

她给了我一枚戒指作为交换，但那是不值钱的玩意。