"I doubt if you can understand how happy this modernizing has made me.

VOA: special.2009.12.07

don't you doubt me there. I want to be a poet for all sorts and kinds.

不要在这点上怀疑我，我希望能写所有人都能接受的诗歌。

耶鲁公开课 - 现代诗歌课程节选

printf Right. When in doubt, let me just use print F for now.

对的，当感到怀疑的，让我现在只用。

哈佛公开课 - 计算机科学课程节选