虽然可以肯定的是在利比亚有些事情会出问题，但是，远远不能确定所有事都会出问题。

But, although it is certain that some things will go wrong in Libya, it is far from certain that everything will go wrong.

youdao

或是物理问题集合,又或者是高中的物理实验室，我们对这些问题都有确切的答案，或者你可以把你的实验结果改成正确的，有些事情是不能明确界定的。

And so this is not like a math problem set or a physics problem set. Or, like a high school physics lab, where we all know what the answer should be, and you could fake your lab results anyway.

youdao

现在，你不能改变自己的基因，但还有些事情是你能做到的，而那可以减少你未来患心脏病的风险。

You can't change your genes but there are things you can do now to decrease your risk for heart disease later.

youdao

And so this is not like a math problem set or a physics problem set. Or, like a high school physics lab, where we all know what the answer should be, and you could fake your lab results anyway.

或是物理问题集合,又或者是高中的物理实验室，我们对这些问题都有确切的答案，或者你可以把你的实验结果改成正确的，有些事情是不能明确界定的。

麻省理工公开课 - 计算机科学及编程导论课程节选