um

音標(biāo)發(fā)音

Um, no. Not any more.
嗯，不會(huì)，再也不會(huì)這樣了。
Or, um, maybe not.
或者，呃，可能不是。
And they are indeed both really important, which is why I think of this as, um, an offdensive move.
而他們兩個(gè)確實(shí)很重要，這就是為什么我把這看作是，嗯，一個(gè)有攻擊性的事件。

Can you hold? She might wanna talk to your mom. Oh,um,OK.See you tomorrow."
So, we can say that -- if we have neon here and we want to think about what's isoelectronic, -- f minus would be isoelectronic. We also have oxygen -- what would the charge on oxygen be? Um-hmm, right. 2 minus.
那么，我們可以說(shuō)--如果我們這里有氖原子,而我們想知道與它等電子的是什么，負(fù)一價(jià)的氟離子就是與它等電子的，我們還有氧-,氧應(yīng)該是幾價(jià)的？沒(méi)錯(cuò)，負(fù)二價(jià)。
麻省理工公開(kāi)課 - 化學(xué)原理課程節(jié)選
I lived with Italians and, um, my entire life was not in English, um, for a year, um, which I loved,
我和意大利人住在一起。所以，整整一年的時(shí)間，我都沒(méi)有接觸英語(yǔ)。當(dāng)然，我挺喜歡這樣一段經(jīng)歷的。
換專業(yè)的理由 - SpeakingMax英語(yǔ)口語(yǔ)達(dá)人

Caitlin Moran, a columnist at The Times, picked up the battle cry (or, um, battle tweet).
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used in writing to represent the sound that people make when they are pausing or deciding what to say next

Um is used in writing to represent a sound that people make when they are hesitating, usually while deciding what they want to say next.