“无偿”造句

我为你所做的一切都是免费的，无偿的，你明白吗？
What I did for you was free, gratis, you understand?

他将收藏品无偿捐献出来。
He was giving his collection away for nothing.

我知道他的帮助不会是无偿的。
I knew his help wouldn't be given gratis.