I don`t understand. I wrote you a note saying I was going to get breakfast and I`d be right back.

怪了，我写给你一张纸条说我要去买早餐，马上就回来。

youdao

I usually remember nothing after leaving a guided tour – either I don』t understand the tour guide or I am inundated with facts I can』t relate to.

一般，如果是跟着导游去的，转一圈回来我什么都不会记得。 原因或者是我无法理解导游说的话，或者是信息太多，我无法联系起来并记住。

youdao

Tom: I don? T understand.

汤姆：我不明白。

youdao

"I don't understand. How can they have no record of her being there." "There has to be some explanation."

VOA: special.2009.06.12

I don't expect you'll all immediately grab it, but you will need to understand it before the quiz comes along.

我不期望你们马上就能掌握，但是你们需要在,考试前弄懂它。

麻省理工公开课 - 计算机科学及编程导论课程节选

I don't understand why you'd want to take a pill to fix something that we know little about.

我不明白为什么你会愿意吃药片来治好一些我们甚至都不清楚的毛病。

对付压力的方法 - SpeakingMax英语口语达人

"When the sentencing was read, I didn't understand what was happening and even now it seems impossible and still I don't understand why I was convicted, " he said in a prison interview through his lawyer the week after the sentencing.

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"I don't like to answer definitions like that that are grounded in science or something else that I don't understand, " he said.

NPR: Democratic Candidates Share in Gay Rights Forum

"I don't understand why they don't accredit Hinduja, " said Soumya Swaminathan, director of the National Institute for Research in Tuberculosis, part of the government's network of biomedical research institutions.

WSJ: TB Fight Hits a Wall in India