But you must be careful. It is easy to get lost in the waves of moving sand especially during sandstorms.

VOA: special.2010.01.04

So it's a way of reminding you, I've got to be careful about the types of things that I put in.

因此我这是在提醒你，一定要对输入的东西的类型,多加注意。

麻省理工公开课 - 计算机科学及编程导论课程节选

Absolutely. You just have to be careful and you know, constantly be looking everywhere.

肯定的啦。你不得不小心一点，并且不断地观察周围的情况。

喜欢自行车 - SpeakingMax英语口语达人

For example, read copies of a group's financial records and be careful of groups with names that sound like well-known charities.

VOA: special.2009.11.02

Be careful. Suppose we are doing an adiabatic process.

假设我们在研究绝热过程。

麻省理工公开课 - 热力学与动力学课程节选

Companies also have to be careful or they could get into trouble with the Equal Employment Opportunity Commission.

VOA: special.2011.02.28

The message I'm trying to get to here, because I'm running you right up against time, is I have to be careful about what's a primitive step.

我想说的事情是，因为我正在跟大家讲算法时间复杂度，我们需要注意一个基本步骤的定义,如果我可以假设。

麻省理工公开课 - 计算机科学及编程导论课程节选

But it also has to be careful, or people could start to worry about an invasion of privacy.

VOA: special.2010.05.28

Let's be careful here; let's do this for Firm 1 and we'll do Firm 2 in a second.

这里要稍微注意一下,我们先写公司1的然后再写公司2的

耶鲁公开课 - 博弈论课程节选

But they do need to be careful not to wound themselves with chainsaws or other pruning tools.

VOA: special.2009.10.06

You would? Be careful, don't lean over too much.

你会吗，小心别太靠着那栏杆。

耶鲁公开课 - 公正课程节选

People in business have to be careful if they are to survive the jungle out there.

VOA: special.2010.05.16

Well--again, we gonna be careful about refining this, just like we all agreed, I suppose, that you can have the very same body even though somebody--the parts come and go, items get added, other items get knocked off.

我们得仔细研究如何对其定义,我们都认可了，先这么假设,即使肉体的某些部位丢失或新增,原来的肉体还是不变，肉体的某些部分可能新增可能丢失。

耶鲁公开课 - 死亡课程节选

Control weeds growing around bean plants, but be careful not to harm the plants.

VOA: special.2009.03.24

Be careful.

一定要注意

耶鲁公开课 - 基础物理课程节选

And be careful about stalagmites you might trip over one on the floor.

VOA: special.2009.12.07

He also did it from the El Camino Community College Library because he thought, I'll be careful, I won't issue this fake press release on my own computer because they might be able to track me back to my own computer.

而且他使用,埃尔卡米诺学院图书馆的电脑进行发布,因为他想,我要小心为妙,不能用自己的电脑散布这条消息,监管机构很可能会追踪到我的电脑上

耶鲁公开课 - 金融市场课程节选

Be careful C it is very sharp, with teeth just like a saw.

VOA: special.2009.06.30

I just go through these equations, 3 but be careful to Z equals three.

我只检查这些方程式，但是注意了，Z等于。

麻省理工公开课 - 固态化学导论课程节选

But the public was warned to be careful of false appeals.

VOA: special.2010.01.16

That's why it's all in French, because it's not copyrighted, and we have to be careful with that in here with these camera rolling--cameras rolling.

都是法文,因为没有相关版权,而且我们必须得特别小心,何况我们还在录像

耶鲁公开课 - 聆听音乐课程节选

But they must be careful not to get too close.

VOA: special.2009.04.15

Now, we need to be careful here about what's going on.

用这个理论来解释时需要小心了。

耶鲁公开课 - 心理学导论课程节选

"That is true," I said, "but you must be careful."

VOA: special.2009.02.07

Anyway, you have to be careful with your motorcycle and always wear your helmet.

不管怎么说，你都要小心骑摩托车，记得一定要带着头盔。

I didn't 实战 - SpeakingMax英语口语达人

"Be careful,my young friend. You are in great danger."

VOA: special.2009.05.23

And he said, "Tal, you'll have to be careful."

他说“Tal，你必须小心“

哈佛公开课 - 幸福课课程节选

"First of all, I want everybody here to be careful about what you post on Facebook because in the YouTube age, whatever you do, it will be pulled up again later somewhere in your life.

VOA: special.2009.09.14

You'd better be careful.

你最好小心点。

I'd better 实战 - SpeakingMax英语口语达人

I declare a variable called n. I'm not giving it a value yet, so I had better be careful.

我申明一个变量n，我先不给它赋值，所以我最好小心点。

哈佛公开课 - 计算机科学课程节选