I am not sure... Everyone was gushing about all the... I think it's modern arts.

我不是很确定……每个人都在滔滔不绝的讲……我认为是现代艺术吧。

喜欢毕加索吗？ - SpeakingMax英语口语达人

I don't know about that. I am not so sure." But then, we realized that like when we walk out that door, it's the whole world again. So you get sucked up by your group, by your sort of identity.

我不知道，不是很确定，然后呢，我们就意识到走出那个大门，又是一个完整的世界，所以你就会,被你的团体，你的身份所束缚。

普林斯顿公开课 - 人性课程节选

I am not sure which one they actually say.

我不确定他们实际上说哪一个。

美式英语和英式英语 - SpeakingMax英语口语达人

Do not think of a pink elephant for the next three seconds ? and I am sure no one thought of a pink elephant right?

在接下来的十秒钟里不要想粉色大象,我肯定没有人想一头粉色大象，是吗？

哈佛公开课 - 幸福课课程节选