I am going to be sad when they finally get a name for it.

我会感到很伤心的,如果他们最后给它起名的话。

麻省理工公开课 - 固态化学导论课程节选

Maybe you could be talking with another friend, who's very sad that the former friend is getting married.

可能你在和另一个朋友聊天，他对刚才那个朋友结婚的事感到难过。

When 课堂 - SpeakingMax英语口语达人

How could you possibly be sad when listening to that kind of music?

听到这样的曲子,你怎么可能感到悲伤呢

耶鲁公开课 - 聆听音乐课程节选

You'd expect him to be sad.

以为他很伤心

耶鲁公开课 - 死亡课程节选

How many of you, if you were playing for, I guess it's going to be America, which is a sad thing to start with,never mind.

有多少人会,假设你为一个球队效力,比如说是美国国家队吧,可能有些难以启齿,没关系

耶鲁公开课 - 博弈论课程节选