Before you start on your tour I'd just like to give you some information about things to look out for as you go.

在你开始旅行之前，我想给你讲一些旅行时的注意事项。

youdao

As I said before, you can find rock art all over the world, but I'd like to focus now on the rock art of the Aboriginal people of Australia.

就像我之前说的，世界各地都有岩石艺术，但是我现在想要关注的是澳大利亚土著人的岩石艺术。

youdao

If you run the program now, it produces exactly the same result as before, like any proper refactoring should.

如果您现在运行程序，那么将产生与以前完全相同的结果，像任何适当的重构应该的那样。

youdao

Some educators and parents do not like the idea of sending students as young as sixteen off to college, before they may be socially ready.

VOA: special.2010.02.25

There's a kind of puzzle there as to-- even if, before we move to the question, how widespread are cases like this?

这里又产生了一种疑团-,甚至在我们探讨，这种案例有多普遍之前？

耶鲁公开课 - 死亡课程节选

So the result is we can combine all of these as a single differential, and just like we've seen before, what that suggests is that we define another new quantity given by this expression.

结果就是我们能把所有的结果,整理成一个单一的微分，就像我们前面看到的一样，这说明我们可以利用这个式子,定义一个新的物理量。

麻省理工公开课 - 热力学与动力学课程节选

Old drugs were not always tested as well as one might like before they went on the market.

FORBES: Why Cheap, Effective Drugs Go Unused

As women gain clout like never before in the media industry, their problems gain ground as well.

FORBES

As you can see, the designers have kept the same industrial, funky and yet austere style as before, and like the original, the famous red accents are back in the mix.

ENGADGET: Verizon HTC Incredible 4G gets press render, sheepishly grins for Mr. Blurrycam