Now before I invite you to join in a discussion in this second part of the seminar, I'd like to make some very important points about our fieldwork - and in fact any field trip to look at rock art.

在开始我们第二部分的讨论之前，我想先说几点和我们的现场考察工作——实际上和所有的岩石艺术考察工作——相关的特别重要的事项。

We're going to a number of sites, and we won't always be together.

我们要去考察很多的现场，而且我们经常要分头行事。

The single largest problem faced by people who manage the sites is - yes, I'm sure you've guessed - damage caused by visitors, even though it's usually unintentional.

所有考古现场的管理人员面临的最大的问题——你们应该已经猜到了——就是访客造成的毁坏，尽管通常是无意造成的。

Whenever you do go to a site, don't forget you can learn many things from observing at a distance instead of walking all over it.

到现场的时候别忘了你并不总是需要四处走动，从远处观察就能获得大量的信息。

This can really help to reduce visitor pressure.

这样能够真正减少游客带来的压力。

People often say, 'Well, there's only two of us and just this one time', but maybe thousands of people are saying the same thing.

人们总喜欢说：“就这一次，就咱们两个人”，但也许成千上万的人都在说同样的话。

And then some basic rules to guide you - we'll have our own camp near a village, but remember never to camp on a site if you go on your own.

除此之外还有一些其他的要遵守的基本规则——我们会在村子旁边搭建营地，但是如果你独自行动的话，千万不要在现场露营。

It may be disrespectful to the people of that culture, and certainly don't make fires, however romantic it may seem.

当地人会认为这是对他们文化的不敬，还有千万不要生火，不管那看起来有多浪漫。

It's really dangerous in dry areas, and you can easily burn priceless undiscovered material by doing so.

在干燥地区生火很危险，一些尚未出土的无价之宝可能就被烧毁了。

So, how are we going to enjoy the rock art on our field trip?

那么我们在这次现场考察中应该如何欣赏这些岩画艺术呢？

By looking at it, drawing it and photographing it - NEVER by touching it or even tracing it.

我们可以认真观察、描绘，可以拍照，但绝不能触碰或在表面临摹。

Rock art is fragile and precious.

岩画艺术十分珍贵，而又十分脆弱。

Remember that climbing on rocks and in caves can destroy in a moment what has lasted for centuries.

时刻记住在岩石上或在岩洞里攀爬很可能会将长存了很多世纪的东西毁于一旦。

So no heroics in Namibia, please!

所以在纳米比亚就请不要逞英雄了！

Try to be extra careful and help others to be too.

一定要尽量小心，同时也要督促其他人小心行事。

And lastly please don't even move rocks or branches to take photographs - you should leave the site intact - I'm sure I can rely on you to do that.

最后一点，请不要移动岩石或树枝来拍照——你们应该保持现场的完整性——我相信你们都能做到的。

Well, that's about all I want to say before today's first discussion, but if you have any questions please ask them now - and don't forget you'll find some fascinating information about world-wide sites on the Internet.

好的，这就是今天咱们的第一次讨论前我要说的。如果你们还有什么问题请现在提出来。同时别忘了你们在互联网上也能找到很多全球考古地点的信息。

Right, first question then?

好了。谁来提第一个问题？