Yes, it's 7. So, I don't know if this is true or not, but I wonder if that's where the actual name 7-Up came from.

对，是七，我不知道这是不是真的，但是我怀疑这才是,七喜名字的真正来源。

麻省理工公开课 - 化学原理课程节选

The "I wonder if" pattern, like it sounds, is used to express the fact that you don't completely know something.

I wonder if”句型，就像字面意思表达的一样，是用来表达你对某事并没有彻底的了解。

I wonder if 课堂 - SpeakingMax英语口语达人

I said that if I was really hygienic, and you can now wonder about how often do I shower?

但是这真的很棒，对不对？,那么为什么我要说这些呢？,我说过如果我真的很讲卫生的话？

麻省理工公开课 - 计算机科学及编程导论课程节选

It made me wonder if they were trying to tell that I should retire; it felt like a retirement party.

这让我怀疑,他们是不是在暗示,我应该退休了,感觉那就像是个退休派对

耶鲁公开课 - 金融市场课程节选

Gee, I wonder if I could come up with a set of transitions occurring inside atomic hydrogen Just right match that what Angstrom measured back in 1853.

嘿！我想知道我是否可以想出,发生在氢原子内的,一系列的跃迁，正好符合,阿姆斯特朗在1853年测得的东西。

麻省理工公开课 - 固态化学导论课程节选

But I wonder if there're any highlights that you would like to lift up?

但我想知道您是否,想分享一下您的经历？

普林斯顿公开课 - 人性课程节选

We can say that, but I wonder if it's possible even for these similes to convince us of the easy coexistence of these two incredibly important theological categories, free will and divine foreknowledge.

我们可以说，但是我还是怀疑，这些比喻是否能够,使我们相信如此这种两个太过于重要的相异点,即自由意志和神圣天命，之间的共存性。

耶鲁公开课 - 弥尔顿课程节选

Because of course,if I haven't had it no wonder I don't remember it but if I have had it,I would have been given that temporary sort of localized amnesia So of course I wouldn't know whether or not I've had it So you ask the nurse ?" "Have I had the operation yet or not?"

因为如果没有手术,难怪我不记得了,但如果手术了，我会被给予那种,短时间的局部失忆药物,所以当然我不知道有没有做了,你就问护士,“我做手术了吗“

耶鲁公开课 - 死亡课程节选

That I wonder if I had been manipulated I had been all to.

我不知道是不是,一直被误导了。

麻省理工公开课 - 电影哲学课程节选

Or you could say "I wonder if" and mean that you really do wonder,

或者你可以用“I wonder if”来表达你的确不是很清楚。

I wonder if 课堂 - SpeakingMax英语口语达人