You've met lots of astronauts, and I've never grilled you about that. I'd thank you to extend me the same courtesy.

你过不少宇航员 我可从来都没拷问你是怎么的 谢谢你以怨德。

I mean, I'm trying to do you a favor here by finding a use for your brain...

你却以怨德。

But if l am generous to someone who is my enemy, who is not the least bit interested in responding to me in kind, then l can be sure that l have truly willed his good and not my own.

但如果我对以怨德者很慷慨，那绝对是出于他的、而非我自己的益处。