嗯，我不知道这想法行不行。

Mmm, I'm not so sure that's a good idea.

《牛津词典》

史蒂文： 嗯， 那时候我能熬通宵， 但是现在不行了。

Steven: Well, in those days I could stay up all night, but now I can't.

youdao

嗯……下午不行，早晨也没空，要么我周二中午去锻炼？呃，不对，这周二也不行。那……要不等到下周二呢……

Well, afternoons don't work. And I can't do mornings. I can come Tuesdays at noon, but not this Tuesday. Or next Tuesday…

youdao

Well, we're not 21, so it's not, we can't rent a car over here,

嗯，我们没满21岁，所以不行，我们在这里不能租车，

和朋友一起逛洛杉矶 - SpeakingMax英语口语达人