I don't understand what he's saying.

我不明白他在说些什么。

I don't understand the instructions.

我不懂这些指令的意思。

Please, I don't understand what I have to do.

我的确不明白我该做什么。

I don't understand what you are talking about.

我不明白你在说什么。

I seem to have involved myself in something I don't understand.

我似乎已经将自己卷入了我不了解的事情当中。

"I don't understand," the detective mumbled, passing a hand through his hair.

“我不明白，”那个侦探嘟囔着，同时用一只手捋头发。

I don't understand your point.

我不理解你的观点。

I'm sorry to cut in on you, but there are one or two things I don't understand.

抱歉打断你，但是有一两个问题我不理解。

I don't understand my teacher's great love until I become a teacher myself.

直到我自己成为了一名教师，才明白我老师的大爱。

Belinda was confused and said, "Sorry, but I don't understand what you are talking about."

比琳达很困惑地说：“对不起，我不明白你在说什么。”

The driver, who knew nothing about what happened, said to him, "Officer, I don't understand. I was doing exactly the speed limit! What seems to be the problem?"

司机完全不清楚这是怎么一回事，对他说：“警官，我不明白。我是精确按照限速行驶的！有什么问题吗？”

I don't understand sign language.

我不懂手语。

I don't understand that at all yet.

我一点也不明白。

I don't understand it.

我不明白。

I don't understand.

我不明白。

I'm afraid I don't understand the difference.

恐怕我不明白其中的区别。

I don't understand the story in the new unit.

我不明白新单位的情况。

"I don't understand your language," said Mary.

“我不懂你的语言。”玛丽说。

I don't understand how you got a ticket today.

我不明白你今天是怎么弄到票的。

"I don't understand that at all," said little Gerda.

“我一点也不明白！”小小的格尔达说。

I don't understand why planting carrots with you is so important to me.

我不明白为什么和你一起种胡萝卜对我这么重要。

I don't understand why you didn't go to the lecture yesterday afternoon.

我不明白为什么你昨天下午没去听讲座。

I was thinking about it and I realized I don't understand how they hold their breath underwater.

我正在考虑这个问题，我意识到我不明白他们在水下是如何屏住呼吸的。

"I don't understand your Bornholmish dialect," said he at last, angrily, and turning his back upon them.

“我听不懂你们波尔霍尔姆的方言。”他终于生气地说，转过身去背对着他们。

Alice did not wish to offend the Dormouse again, so she began very cautiously, "But I don't understand."

爱丽丝不想再惹睡鼠生气，于是开始小心翼翼地说：“可是我不懂。”

I don't understand what you mean.

我不懂你的意思。

I don't understand why we always have to go see such artsy-fartsy movies.

我纳闷为什么我们非要来看这种附庸风雅的片子。