We tend to be egotistical creatures, he says; when people smile, we tend to think they are smiling at us, but when they look angry, we think they are mad at someone else.

他说，我们人类是自我的生物；当别人微笑时，我们愿意认为他们是对我们微笑，而当别人生气时，我们就愿意认为他们在对其他人生气。

youdao

The traveller was very angry,"This man must be mad,"he thought.

行路人很生气。

youdao

Next you'll be telling me mad meant "angry" a long time ago.

下次你肯定会告诉我mad在很久以前的古英语中意思是“生气”了。

youdao

It you are really angry, you might say you are mad as a hornet.

VOA: special.2009.06.28

"I have moments when I throw water bottles across the room and throw my walker and just get angry and mad that someone did this to me... and that I won't be able to be dance with the same movements that I had before, " she said.

CNN: Boston bombings destroy dancer's foot, but not her spirit